You also use "couldn't" in a question to suggest doing something.

用在疑问句中也可用以建议做某事。

youdao

You use "Shall we" to suggest doing something with somebody else.

用以建议与别人一起做某事。

youdao

They suggest that Google will eventually be able to publish all the data it wants and be justified in so doing.

这些话暗示，谷歌总有一天能将所有它想发布的信息公之于众，而且认为这样做完全合理。

youdao

Remember to use "let's" when you want to suggest doing something

当你想建议做某事的时候，记得用“let's”句型。

Let's 课堂 - SpeakingMax英语口语达人

And I'm trying to suggest that Milton's composition of this poem is actually doing something for him, that it gets him somewhere, and that it's functional in a genuine sense.

我试图设想弥尔顿的这首诗,实际上是在为他做一些事情，使他，能够真正的发挥某些作用。

耶鲁公开课 - 弥尔顿课程节选

But while the New Atheists may be loud, outspoken and popular reading matter among the sort of book buyers who use Amazon or read the New York Times, is there any evidence to suggest they are doing anything more than preaching to the (non-) converted?

CNN: The rise of the 'New Atheists'

Mr. Tucker gave a recent speech that appeared to Kremlinologists to suggest he thinks the BOE could be doing more to support the economy.

WSJ: Wanted: BOE Chief to Tackle 'Jihadists'

All in all, Mr Summers is playing with fire by doing anything to suggest that his support for a strong dollar is even slightly equivocal.

ECONOMIST: Gambling with the mighty greenback | The