英语无助的英文怎么说

If you want to describe someone as being "helpless" or "useless" in English, you could say that they are "inept" or "ineffectual." Here are some example sentences:

Despite his best efforts, he was completely inept at fixing the leaky faucet.
She found herself feeling ineffectual in the face of such a complex problem.
He seemed powerless and helpless to change the situation.

It's important to note that these words can be perceived as harsh or negative, so it's usually better to find a more diplomatic way of expressing the same idea. For example, you could say that someone is "not very skilled" or "not very effective" at a particular task.