should do是什麼時態

例：

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

今年她的功課應該學得好，她的注意力很集中。

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

只要父母給點鼓勵，他應該會幹得很好。

This extra strong glue should do the job.

這種超黏度膠應該管用。

Surely we should do something about it?

我們總得想個辦法吧？