现在进行时:
表示正在进行的动作。例如:
She is reading a book now.
过去进行时:
表示过去某个时刻正在进行的动作。例如:
They were watching TV last night.
将来进行时:
表示将来某个时刻将要进行的动作。例如:
We will be traveling to Paris next month.
过去将来进行时:
表示过去某个时刻将要进行的动作。例如:
She would be studying in the library at that time.
现在完成进行时:
表示从过去某一时间开始一直持续到现在的动作,并且可能继续持续下去。例如:
They have been working on the project for five years.
过去完成进行时:
表示在过去某一时间之前已经完成的动作,并且可能继续持续下去。例如:
They had finished the work before going to bed.
将来完成进行时:
表示将来某一时间之前已经完成的动作,并且可能继续持续下去。例如:
By next year, they will have completed the construction of the new highway.
过去将来完成进行时:
表示过去某一时间之前将要完成的动作。例如:
They would have been studying in the library if they had arrived earlier.
动词在介词后:
需要加ing。例如:
She is interested in learning French.
动词作主语:
需要加ing。例如:
Swimming is my favorite sport.
这些句型中,动词加ing可以构成不同的时态和非谓语动词形式,具体使用哪种形式取决于句子的语境和所要表达的意义。希望这些信息对你有所帮助。