I'll engage for John's behaviour should you decide to employ him.

如果你决定聘用约翰,我愿为他的行为担保.

I can engage for his honesty.

我保证他为人诚实.

I will engage for his behaviour should you decide to employ him.

如果你能决定雇用他,那么我可以担保他的行为.

' It is more than I engage for, I assure you. '

“ 老实跟你说吧,这不是我份内的事. ”

That is more than I can engage for.

那我可保证不了.

That's all I can engage for.

我所能担保的仅此而已.

She will engage for her promise.

她将保证履行诺言.