should do是什么时态

　　例：

　　She should do well in her studies this year ─ she's very focused.

　　今年她的功课应该学得好，她的注意力很集中。

　　With a little encouragement from his parents he should do well.

　　只要父母给点鼓励，他应该会干得很好。

　　This extra strong glue should do the job.

　　这种超黏度胶应该管用。

　　Surely we should do something about it?

　　我们总得想个办法吧？