温故知新
英语中，情态动词的用法较为烦琐，不是在短篇幅中能够介绍完全的。读者要想真正活用情态动词，尚需在阅读中细心体会。现附上“情态动词用法一览表”，以备查阅。
can/could/may/might
can的用法：
can/could/may/might
can的用法：
could的用法：
may的用法：
might的用法：
will / would / be going to / used to
will的用法：
would的用法：
used to的用法：
shall/should / ought to / had better
shall的用法：
should的用法：
ought to的用法：
had better的用法：
must / have to / have got to
must的用法：
have to的用法：
may的用法：
might的用法：
will / would / be going to / used to
will的用法：
would的用法：
used to的用法：
shall/should / ought to / had better
shall的用法：
should的用法：
ought to的用法：
had better的用法：
must / have to / have got to
must的用法：
have to的用法：
