my homework in 20, Feb

1. Choose the correct sentence. B) The effect of the antibiotic on her infection was surprising. A) I did not know that antibiotics could affect people so quickly. A) Plastic surgery had an effect, not only on her appearance, but on her self-esteem. B) If the chemotherapy has no effect, should she get surgery for the tumor? A) When will we know if the chemotherapy has taken effect? Well, I have another question to you. ^^ According to the ‘grammar in use’, I have to use ‘may have done’ or ‘might have done’ for the past of a ‘may’. I think ‘might’ is also the past a ‘may’. How about it? Does the ‘may have done’ or ‘might have done’ use often? Please, answer for me. Thanks. Take care.

Mr [이름], Thank you again!:) I appreciate this questions. May is used to ask for permission or suggest something. We used might to suggest a small possibility of something.For the past, we use might have. T.Sheela   1. Choose the correct sentence.B) The effect of the antibiotic on her infection was surprising. >>Correct! >>Explanation: Use effect whenever any of these words precede it: a, an, any, the, take, into, no.A) I did not know that antibiotics could affect people so quickly. >>Correct! >>Explanation: Use the verb affect when you mean to influence rather than to causeA) Plastic surgery had an effect, not only on her appearance, but on her self-esteem. >>Correct! >> Explanation: Use effect whenever any of these words precede it: a, an, any, the, take, into, no.B) If the chemotherapy has no effect, should she get surgery for the tumor? >>Correct! >> Explanation: Use effect whenever any of these words precede it: a, an, any, the, take, into, no.A) When will we know if the chemotherapy has taken effect? >>Correct! >>Explanation: Use effect whenever any of these words precede it: a, an, any, the, take, into, no.Well, I have another question to you. ^^ >>Correct!According to the 'grammar in use', I have to use 'may have done' or 'might have done' for the past of a 'may'. >> According to grammar in use, I have to use, may have done or might have done is the past tense of may. I think 'might' is also the past a 'may'. >>I think might is also the past of may. How about it? >>Correct! Does the 'may have done' or 'might have done' use often? >>Are may have done and might have done used that often? Please, answer for me. >>Correct!Thanks. Take care. >>Correct!