I really want to know what we can do to help them 这里为什么不能用what we could
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I really want to know what we can do to help them 这里为什么不能用what we could
I really want to know what we can do to help them 这里为什么不能用what we could
I really want to know what we can do to help them 这里为什么不能用what we could
你才初三,初中不能用,高中就能用了.
这里用can只是保持时态一致,前面want to know 用的现在时,后面can用现在时保持一致.
当然could只是委婉,这里can语气更强.
could
助词 v.aux.
1.can的过去式
She could play the violin when she was five.
她五岁时便能拉小提琴了。
2.(用于虚拟语气,表示与事实相反的设想)能,可以
I wish I could go to France.
但愿我能去法国。
I would go if I...
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could
助词 v.aux.
1.can的过去式
She could play the violin when she was five.
她五岁时便能拉小提琴了。
2.(用于虚拟语气,表示与事实相反的设想)能,可以
I wish I could go to France.
但愿我能去法国。
I would go if I could.
能去我就去。
3.(表示可能性)可能
That could be my train.
那可能是我要乘的火车。
4.(用于婉转语气)能,可以
Could I smoke here?
我可以在这里抽烟吗?
Couldn't you try it again?
你可否再试一下?
此处没有用could的理由，用can就很合适，来陈述事实。
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可以用吧
应该用can, 因为句子是一般现在时，主句和从句时态要一致。could是过去时。