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know加how to do可以,没见过直接加to do sth.或doing sth一般是直接加名词know 作 “见到过；听到过”[一般用于过去时或完成时]：但不是固定know+to do sth 固定句型I've never known him to cry.我从未见过他哭泣.
know后面加doing还是todo
know加how to do可以,没见过直接加to do sth.或doing sth一般是直接加名词know 作 “见到过；听到过”[一般用于过去时或完成时]：但不是固定know+to do sth 固定句型I've never known him to cry.我从未见过他哭泣.
think作谓语,一般也是加宾语或从句作“料想；猜想；相信”意,可以像下面那样翻译,但不是think + to do sth 的固定句型I didn't think to see my boss in the party.我没想到会在聚会上见到我的老板.
Know的例句
I don't know the name of the place...
我不知道那个地方的名字。
I know that you led a rifle platoon during the Second World War...
我知道你在二战期间率领一个步枪排。
Gifford was a friend. I'd known him for nine years...
吉福德是我的一位朋友。我和他认识9年了。
Do you two know each other?...
你们俩互相认识吗？