be willing to do还是doing

是be willing to do 愿意做某事，乐意做某事，因为to在这里是不定式符号，而不是介词，所以接do，不接doing。

be willing to do 例句：

I'm willing to help, within limits.

我愿意帮忙，可有一定的限度。

I am willing to make a trade with you.

我愿意和你做个交易。

I'm perfectly willing to discuss the problem.

我十分乐意讨论这个问题。

I am willing to admit that I do make mistakes.

我愿意承认我确实会犯错误。

Anyone willing to assist can contact this number.

凡愿协助者可拨此号码联系。

She was willing to bend the rules in Mary's favour.

她愿意放宽规定以有利于玛丽。