4 Read the pairs of sentences and explain the difference in meaning. 1 a He's written a book. b He's been writing a book. 2 a Who's eaten my chocolates? b Who's been eating my chocolates? 3 a She's never been to a wedding before. b She'd never been to a wedding before. 4 a I've tried to call her. b I've been trying to call. 5 a They'd been married for thirty-five years! b They've been married for thirty-five years! 10

 He  came home late yesterday.
 She is very glad: she has finished her composition at last. 
 He had translated the whole text by eleven o' clock.
 I have never been in Rome.
 Last year we  worked very much. 
 When I had breakfast, I went to school.
 I haven't seen you for ages! I am very glad to see you. 
 When did you see the Swan Lake? 
 My sister has already graduated from the university. 
 He repaired the toy which his brother had broken the day before. 
 I have seen an interesting TV programme this week.  
 Have you ever been to Trafalgular Square?  
 They were cooking the whole day yesterday. 
 I  have just seen  Jack.  
 She was washing the dishes from five till six. 
 Look! She drawing a very nice picture. 
 At this time yearsterday I was talking to my friend. 
 The TV programme had begun before I came home. 
 I haven't eaten ice cream since summer. 
 I understood that she hadn't read my letter. 
 She was doing the rooms when I came home. 
 It's all right: she has found the way out of the situation.

ответ:

объяснение:

if your family have a pet dog, who will take it for a walk every morning ?

if my parents know   more about computers, they will understand why i need a new laptop

hank will not become an it specialist if he not go to university

we will wear t-shirt and shorts all the year round if we love in a hot country

if he not hurry up he will miss the beginning of the film

what’s wrong with you! if you not eat your lunch you'll be hungry soon

конструкция

( придаточное предложение) if + present simple + (главное предложение) + future simple

> if my parents know   more about computers, they will understand why i need a new laptop

или

future simple + if + present simple

> we will wear t-shirt and shorts all the year round if we love in a hot country

также: помимо will можно использовать модальный глагол can, may)