May was able to make the bed by herself when she was 4 years old.
i am sorry that i haven't finished the book yet
已经住了多久.how long have you been here?how long have you lived here?
第一个句子也可以用could代替was able to
第二个句子强调的是读完,所以finish更好
May was able to make the bed by herself when she was 4 years old.
i am sorry that i haven't finished the book yet
已经住了多久.how long have you been here?how long have you lived here?
第一个句子也可以用could代替was able to
第二个句子强调的是读完,所以finish更好