TAILIEUCHUNG - Oxford guide to english grammar part 50

Tham khảo tài liệu 'oxford guide to english grammar part 50', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PAGE 337 257 Verbs in conditional sentences d As well as the past simple we can use the continuous or could. If the sun was shining everything would be perfect. Ifl could help you I would but I m afraid I can t. As well as would we can use other modal verbs such as could or might in the main clause. IfI had a light I could see what I m doing. Ifwe could roll the car down the hill we might be able to start it. e We can use would in the if-clause for a request. If you wouldn t mind holding the line I ll try to put you through. Sometimes there is no main clause. Ifyou djust sign here please. We can also use would like. If you d like to see the exhibition it would be nice to go together. 5 Open conditions in the past a We can use the past tense for an open condition in the past. Perhaps Mike took a taxi. Well if he took a taxi he ought to be here by now. I used to live near the library. IfI wanted a book I went and got one I would go and get one. b We can use a Type 2 pattern as the past of a Type 1. Type 1 Don t go. If you accept the invitation you will regret it. Type 2 I told you that if you accepted the invitation you would regret it. And now you are regretting it aren tyou c We can combine a past condition with a future result. If they posted the parcelyesterday it won t get here before Friday. 6 Type 3 conditionals a The pattern is if. past perfect. would perfect. Ifyou had taken a taxi you would have got here in time. If I d phoned to renew the books I wouldn t have had to pay a fine. The man would have died if the ambulance hadn t arrived so quickly. We d have gone to the talk if we d known about it. We would have gone if we had known. Here the past perfect refers to something unreal an imaginary past action. Ifyou had taken a taxi means that you didn t take one. We cannot use the past simple or perfect in the main clause. NOT Ifyou had taken a taxi you got hadgot here in time. NOTE Would have or had have is not used in the if-clause except in very informal .

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