help后面可以加不定式，包括省略to的不定式，也可以跟介词with。

could：

modal用于can的过去时;(询问是否可做某事)能，可以;(礼貌地请求别人做事)能；

v.把(食品)装罐保存;让…卷铺盖走人;炒…的鱿鱼；

can的过去分词和过去式

扩展资料

I knew from past experience that alternative therapies could help

根据过去的经验，我知道替代疗法可能有用。

I was just wondering if you could help me

不知您是否能帮我个忙。

But it is not clear how far they could help with the work on a power plant.

但他们在电厂工程中能给予多少帮助尚不清楚。

A new machine no bigger than a 10p piece could help save babies from cot death

一种体积不超过10便士硬币大小的新机器能防止婴儿猝死。

If only someone could help me!

有谁能帮助我就好了！