be动词+a.(形容词)+动词怎么处理?to do 还是 doing?

2024-11-17 00:47:38
推荐回答(3个)
回答1:

  be+adj.+to do

回答2:

It is useful to learn English.
所以是to do

回答3:

doing
be 后用doing
固定短语:be doing