A question about tense Bill:'Mary ,why are you baking a cake now? it is not time for supper!' Mary:'Bill, this cake is not for you.I visited the Black's in the morning. Do you still remember Mrs Black's son --little Tom? Poor boy, he was sick,so I am baking a cake for him.' I don't understand, why Mary says'Tom was sick' instead of saying 'Tom is sick'. I believe Tom is still sick when Mary is saying this sentence. Whould you please answer my question? Thank you ..

What is the difference between them? Would you like a donut? Do you want a donut? What is the difference between them? I know the frist sentence is more polite than the second one,but I suppose there is other difference between them. Please tell me the answer . Thank you.

Which one is better? Dear customers ,if I don't replay your messages in time ,I must be out for dinner,please wait a couple of minutes. ___________________________________________________________ This sentence is sent by my tour guide.I think this one would be better: 'If I fail to replay your messages in time ,.............' I think my sentence is better,but I am not sure,which one is more authentic ? Please tell me ,thank you.

A question about grammar. A:I will go out for the moive'The Smurfs' ,Do you want to come with me? B:No,thank you.I have already watched this moive.I watched it last night. ____________________________________________________________ I want to combine the answer of B into one sentence. I want to emphasis the exactly time when I watched this moive in a present perfect sentence. 'I have already watched this moive last night.' I know this sentence is grammatically wrong.'last night ' can't be used in a present perfect sentence. ' I have already watched this moive for one day.'This sentence is correct in the grammar but I think it is kind of weird. Please help me with this sentence. Thank you.

A question about tense. Sam: I will go to New York tomorrow morning.I come by to say goodbye to you. Jane: Oh ,what a shame, I am having a party tomorrow night. Could you defer your departure ?I wish you could attend my party. ________________________________________________________ I read this dialogue from a textbook.I can't understand this sentence : I am having a party tomorrow night. I think this sentence is correct :I will have a party tomorrow night. Please answer my question if you know the answer .Thank you.

Which one is correct Are you feeling bored? Do you feel bored? which one is correct? If they are both correct in grammar,please do tell which one is more genuine English? Thank you .

A question about grammar. Her reading has improved greatly since she changed schools. _____________________________________________________ I read this sentence in a textbook.I think it is a wrong sentence. The correct one should be this: her reading skills have improved greatly since she switched the school. Am I correct? please tell me. Thank you.

A queation about tense Witnesses said that there was nothing unusual before the explosion happened. _______________________________________________________ I study English tense now,so I pay more attention on grammar. Witnesses said that there had been nothing unusual before the explosion happened. I think this is the correct sentence ,using the past perfect tense . But the sentence above the line is quoted from a newspaper,I believe it was written by a native English speaker,he or she wouldn't make such an mistake . Please tell me whether I am correct.

which one is correct oral English or spoken English,which one is correct?and why? please tell me if you know the answer. Thank you.