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1·I am very sorry indeed for my foolish and ungrateful conduct.

我实在为我的愚蠢和忘恩负义的行为感到非常抱歉。

2·I'm an ungrateful beast, I know, sobbed Toad, shedding bitter tears.

“我知道，我是个忘恩负义的畜生。”癞蛤蟆托德抽泣着，流下了苦涩的眼泪。

3·I thought I should choke; I could not tell any one, for that would have been ungrateful.

我想，我要闷死了；我不能告诉任何人，因为那样做是忘恩负义的。

4·I would be an ungrateful wretch if I didn't tell you at least once that it was you who brought some meaning back into my life.

如果我一次也不跟您说：是您给我的生命带来了新的意义，那我可就是个忘恩负义的坏蛋了。

5·Her family is ungrateful and spiteful. When Maggie buys them a house, her mother flies off the handle, worried that her welfare scam will be ruined.

她有一个忘恩负义、怀恨于心的家庭。麦琪给家里买了一套房子，但她妈妈却因为担心自己的诈骗救济会败露而大发雷霆。

6·He's an ungrateful so-and-so.

他是个忘恩负义的家伙。《牛津词典》

7·I thought it was ungrateful of her.

我认为她这是不知好歹。《柯林斯英汉双解大词典》

8·People are ungrateful when in a bad mood.

心情不好的时候，人们就不会表达感激之情。

9·You are really an ungrateful wretch to complain instead of thanking him.

你不但不谢他，还埋怨他，真不知好歹。《新英汉大辞典》

10·No doubt that sounds ungrateful.

勿庸置疑，这听起来忘恩负义。