句中的am为什么不用was呢
I was supposed to take care of him.为什么这句话要用was 不用am呢?
he did not understand English.句中的为什么用did 而不用was?
how was your day?中的was 为什么不用were
When i am middle aged.为什么不用middle age呢?
i was at home last night.这事一个过去时态的句子.这里为什么不用were 呢,我记得过去时am变
My arm hurt为什么不用was hurt呢
为什么If only I were abird.中的were不用was
为什么 if i were a boy 中的were 不用was?
I like to have someone to play with.句中的with不是介词吗,后面为什么不用放宾语呢
i am sorry for what i have said为什么不用was?
第一句中的some kind 为什么kind不用加s?
就两题potatoes中的e为什么不用发音呢?hot dog中的t要发音吗?为什么?