很简单.
这是两个句子,用and并列联起来的.
Our teacher asked us to stop what we were doing and listen .
等于.
Our teacher asked us to stop what we were doing.
Our teacher asked us to listen.
所以,已经有to了.
不用加.
很简单.
这是两个句子,用and并列联起来的.
Our teacher asked us to stop what we were doing and listen .
等于.
Our teacher asked us to stop what we were doing.
Our teacher asked us to listen.
所以,已经有to了.
不用加.