for, since, from, ago and before 
for, since, from, ago and before
For, since and from 'point forwards' in time. Ago and before 'point backwards' in time.
  THEN for three months  >N0W
  since my birthday
  THEN from six o'clock  NOW
  from now on
  three years ago_
  three years before  THEN
  For details of the use of ago and before 
 We use for to say how long something lasts. [ for + period of time]
  I once studied the guitar for three years.
  That house has been empty for six weeks We go away for three weeks every summer.
  My boss will be in Italy for the next ten days.
  When we talk about a period of time up to the present, we use for with the present perfect tense (have + past participle).
  I've known her for a long time. (NOT Iknow-her . . .)
  A present progressive with for often refers to the future.
  How long are you staying for? ( = Until when . . .)
  We can leave out for with How long . . .?
  How long are you staying ?
  How long have you been waiting?
From and since give the starting point of an action or state: they say when something begins or began.
  from/since + starting point
  I'll be here from three o'clock onwards.
  I work from nine to five.
  From now on, I'm going to go running every day. From his earliest childhood he loved music.
  I've been waiting since ten o'clock.
  I've known her since January. Since gives the starting point of actions and states that continue up to the present; from gives the starting point of other actions and states.
  THEFT from nine to five  >TH£N
  THEtf from his childhood
  from three o'clock onwards NOW from now on
THEtf
  since ten o'clock
*~N0W
  since January
  For and since can both be used with the present perfect (have + past participle). They are not the same. [ for + period] [ since  +  starting  point]
  I've known her for three days.  I've known her since Tuesday.
  I 've been here for a month.  I 've been here since July.
  I've had my car for ages.  I've had my car since 1980.
 
 'copula1 verbs 
 'social' language 
 (a) few and (a) little 
 (a)round and about 
 (be) used to + noun or... -ing 
 (Great) Britain, the United Kingdom, the British Isles and England 
 -ing form ('gerund') 
 -ing form after to 
 -ing form or infinitive? 
 abbreviations 
 about to 
 above and over 
 across and over 
 across and through 
 active verb forms 
 actual(ly) 
 adjectives ending in -Iy 
 adjectives without nouns 
 adjectives: order 
 adjectives: position 
 adverbs of manner 
 adverbs: position (details) 
 adverbs: position (general) 
 after (conjunction) 
 after (preposition); afterwards (adverb) 
 after all 
 afternoon, evening and night 
 ages 
 ago 
 all (of) with nouns and pronouns 
 all and every 
 all and whole 
 all right 
 all with verbs 
 all, everybody and everything 
 almost and nearly 
 also, as well and too 
 although and though 
 among and between 
 and 
 and after try, wait, go etc 
 another 
 any (= 'it doesn't matter which') 
 any and no: adverbs 
 appear 
 articles: a and an; pronunciation of the 
 articles: a/an 
 articles: countable and uncountable nouns 
 articles: introduction 
 articles: special rules and exceptions 
 articles: talking in general 
 articles: the 
 articles: the difference between a/an and the 
 as and like 
 as if and as though 
 as much/many ... as ... 
 as well as 
 as, because and since (reason) 
 as, when and while (things happening at the same time) 
 as...as ... 
 ask 
 at all 
 at, in and on (place) 
 at, in and on (time) 
 be + infinitive 
 be with auxiliary do 
 be: progressive tenses 
 because and because of 
 before (adverb) 
 before (conjunction) 
 before (preposition) and in front of 
 begin and start 
 big, large, great and tall 
 born 
 borrow and lend 
 both (of) with nouns and pronouns 
 both with verbs 
 both... and... 
 bring and take 
 British and American English 
 broad and wide 
 but = except 
 by: time 
 can and could: ability 
 can and could: forms 
 can with remember, understand, speak, play, see, hear, feel, taste and smell 
 can: permission, offers, requests and orders 
 can: possibility and probability 
 close and shut 
 come and go 
 comparison: comparative and superlative adjectives 
 comparison: comparative and superlative adverbs 
 comparison: much, far etc with comparatives 
 comparison: using comparatives and superlatives 
 conditional 
 conjunctions 
 contractions 
 countable and uncountable nouns 
 country 
 dare 
 dates 
 determiners 
 discourse markers 
 do + -ing 
 do and make 
 do: auxiliary verb 
 during and for 
 during and in 
 each and every 
 each other and one another 
 each: grammar 
 either... or... 
 either: determiner 
 ellipsis (leaving words out) 
 else 
 emphasis 
 emphatic structures with it and what 
 enjoy 
 enough 
 even 
 eventual(ly) 
 ever 
 every and every one 
 except 
 except and except for 
 exclamations 
 excuse me, pardon and sorry 
 expect, hope, look forward, wait, want and wish 
 explain 
 fairly, quite, rather and pretty 
 far and a long way 
 farther and further 
 fast 
 feel 
 fewer and less 
 for + object + infinitive 
 for, since, from, ago and before 
 for: purpose 
 future perfect 
 future progressive 
 future: introduction 
 future: present progressive and going to 
 future: shall and will (interpersonal uses) 
 future: shall/will (predictions) 
 future: simple present 
 gender (masculine and feminine language) 
 get (+ object) + verb form 
 get + noun, adjective, adverb particle or preposition 
 get and go: movement 
 go ... -ing 
 go meaning'become' 
 go: been and gone 
 had better 
 half (of) 
 hard and hardly 
 have (got) to 
 have (got): possession, relationships etc 
 have + object + verb form 
 have: actions 
 have: auxiliary verb 
 have: introduction 
 hear and listen (to) 
 help 
 here and there 
 holiday and holidays 
 home 
 hope 
 how and what... like? 
 if only 
 if so and if not 
 if-sentences with could and might 
 if: ordinary tenses 
 if: special tenses 
 ill and sick 
 imperative 
 in and into (prepositions) 
 in case 
 in spite of 
 indeed 
 infinitive after who, what, how etc 
 infinitive of purpose 
 infinitive without to 
 infinitive: negative, progressive, perfect, passive 
 infinitive: use 
 instead of... -ing 
 inversion: auxiliary verb before subject 
 inversion: whole verb before subject 
 irregular verbs 
 it's time 
 it: preparatory object 
 it: preparatory subject 
 last and the last 
 let's 
 letters 
 likely 
 long and for a long time 
 look 
 look (at), watch and see 
 marry and divorce 
 may and might: forms 
 may and might: permission 
 may and might: probability 
 mind 
 modal auxiliary verbs 
 more (of): determiner 
 most (of): determiner 
 much (of), many (of): determiners 
 much, many, a lot etc 
 must and have to; mustn't, haven't got to, don't have to, don't need to and needn't 
 must: deduction 
 must: forms 
 must: obligation 
 names and titles 
 nationality words 
 need 
 negative questions 
 negative structures 
 neither (of): determiner 
 neither, nor and not... either 
 neither... nor... 
 next and nearest 
 next and the next 
 no and none 
 no and not 
 no and not a/not any 
 no more, not any more, no longer, not any longer 
 non-progressive verbs 
 noun + noun 
 numbers 
 once 
 one and you: indefinite personal pronouns 
 one: substitute word 
 other and others 
 ought 
 own 
 participle clauses 
 participles used as adjectives 
 participles: 'present' and 'past' participles (-ing and -ed) 
 passive structures: introduction 
 passive verb forms 
 past tense with present or future meaning 
 past time: past perfect simple and progressive 
 past time: past progressive 
 past time: present perfect progressive 
 past time: present perfect simple 
 past time: simple past 
 past time: the past and perfect tenses (introduction) 
 perfect tenses with this is the first time..., etc 
 personal pronouns (I, me, it etc) 
 play and game 
 please and thank you 
 possessive with determiners (a friend of mine, etc) 
 possessive's: forms 
 possessive's: use 
 possessives: my and mine, etc 
 prepositional verbs and phrasal verbs 
 prepositions after particular words and expressions 
 prepositions and adverb particles 
 prepositions at the end of clauses 
 prepositions before particular words and expressions 
 prepositions: expressions without prepositions 
 present tenses: introduction 
 present tenses: present progressive 
 present tenses: simple present 
 progressive tenses with always 
 punctuation: apostrophe 
 punctuation: colon 
 punctuation: comma 
 punctuation: dash 
 punctuation: quotation marks 
 punctuation: semi-colons and full stops 
 question tags 
 questions: basic rules 
 questions: reply questions 
 questions: word order in spoken questions 
 quite 
 real(ly) 
 reflexive pronouns 
 relative pronouns 
 relative pronouns: what 
 relative pronouns: whose 
 relatives: identifying and non-identifying clauses 
 remind 
 reported speech and direct speech 
 reported speech: orders, requests, advice etc 
 reported speech: pronouns; 'here and now' words; tenses 
 reported speech: questions 
 requests 
 road and street 
 say and tell 
 see 
 seem 
 shall 
 short answers 
 should 
 should after why and how 
 should and would 
 should, ought and must 
 should: (If I were you) I should ... 
 similar words 
 since (conjunction of time): tenses 
 singular and plural: anybody etc 
 singular and plural: irregular plurals 
 singular and plural: plural expressions with singular verbs 
 singular and plural: pronunciation of plural nouns 
 singular and plural: singular words ending in -s 
 singular and plural: singular words with plural verbs 
 singular and plural: spelling of plural nouns 
 slow(ly) 
 small and little 
 smell 
 so am I, so do I etc 
 so and not with hope, believe etc 
 some and any 
 some/any and no article 
 some: special uses 
 somebody and anybody, something and anything, etc 
 sound 
 spelling and pronunciation 
 spelling: -ise and -ize 
 spelling: -ly 
 spelling: capital letters 
 spelling: ch and tch, k and ck 
 spelling: doubling final consonants 
 spelling: final -e 
 spelling: full stops with abbreviations 
 spelling: hyphens 
 spelling: ie and ei 
 spelling: y and i 
 still, yet and already 
 subject and object forms 
 subjunctive 
 such and so 
 suggest 
 surely 
 sympathetic 
 take 
 take (time) 
 tall and high 
 taste 
 telephoning 
 telling the time 
 tenses in subordinate clauses 
 that: omission 
 the same 
 there is 
 think 
 this and that 
 too 
 travel, journey and trip 
 unless and if not 
 until and by 
 until and to 
 used to + infinitive 
 verbs with object complements 
 verbs with two objects 
 way 
 weak and strong forms 
 well 
 when and if 
 whether and if 
 whether... or... 
 which, what and who: question words 
 who ever, what ever, how ever etc 
 whoever, whatever, whichever, however, whenever and wherever 
 will 
 wish 
 worth ... -ing 
 would 
 would rather 
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Science Facts
Some babies are born still enclosed in the sac that holds the fluid in which they develop in the womb. It used to be considered a sign of good luck.World War II leader Winston Churchill was born like this.       
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