忘恩负义的英文简写为ungrateful或ingratitude。

双语例句:

1、他是个忘恩负义的家伙。

He's an ungrateful so-and-so.

2、政府从选民那里得到的只有忘恩负义。

The Government could expect only ingratitude from the electorate.

3、我觉得这样做有些忘恩负义。

I thought it was rather ungrateful