I have a letter _____.A.to write B.writing C.to write with D.writing withHe wants to buy a house____.A.living B.to live C.living in D.to live in一直都弄不懂这两个句子,讲一下理由,

问题描述:

I have a letter _____.A.to write B.writing C.to write with D.writing with
He wants to buy a house____.A.living B.to live C.living in D.to live in
一直都弄不懂这两个句子,讲一下理由,

A和D.
write在此为及物动词,所以后面不加介词,to write 表目的,表示还未完成的动作.
live 为不及物动词,后面不能直接加宾语,必须加介词in 表示居住地 .同样to live 也是表示将来的动作.