3) All the class is going to be punished, because someone has written an offensive anonymous essay. You know, I am not even sure that Present Perfect is necessary in this sentence :P. Isn't it optional in AmE and BrE? I used it on purpose,

I might be wrong, but I'm afraid "Who has completed all the exercises" might be ok, and "Who has demolished such a beautiful cemetary" might not. I see that in Jim's and Amy's examples there always seems to be an

However, we usually prefer as simple past tense when we identify the person, thing, or circumstances responsible for a present situation (because we are focusing on the past cause, not the present result). That would explain my aversion to the use

Who has let the cat in? (= look at the mess the cat has done ..) Who let the cat in? ( who was the person responsible ..) I think this explanation seems a little iffy in my opinion. If you walk into your kitchen and saw a

I'm going to quote some stuff that can be found in Swan's Practical English Usage, which is often considered to be the most complete ESL grammar book available. This should apply to BrE, I guess. Here are some short paragraphs written by

If a situation calls for present perfect, regardless whether it's in Britain or in the US, the same grammar rules still applies. I was told there is this difference: American: I just saw your sister / I've just seen your sister. British:

Write the sentences in your exerice book.Fill in the gaps Use the simple past or the present perfect. Uncle George___(to be) to London , but he___(never to visit) Notthing Hill Carnival

Hello, Sivakumar-- and welcome to English Forums. Use the present perfect when the action relates to now in some way, and the simple past when the action is finished and done with. When you say 'I have sent the letter today', it stresses the

it is an action verb, which justifies the use of have in simple past as a substitution of present perfective in American English Please explain why this might be so. I see no relationship between the two uses. The sentence under consideration

Hi, can you gave me an example of essay with simple tense, perfect tense, future perfect Here are some examples. simple past tense - Mary cooked dinner present perfect tense - Mary has cooked dinner future perfect tense - Mary