i am sorry / you so much trouble.and thank you for your help.a:gave ; b:to have given.请分析

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i am sorry / you so much trouble.and thank you for your help.a:gave ; b:to have given.请分析

i am sorry / you so much trouble.and thank you for your help.a:gave ; b:to have given.请分析
i am sorry / you so much trouble.and thank you for your help.a:gave ; b:to have given.
请分析

i am sorry / you so much trouble.and thank you for your help.a:gave ; b:to have given.请分析
I am sorry to do sth是一个固定的搭配.
因为这句话的意思是,很不好意思之前这么麻烦你,谢谢你的帮助.
现在完成时表示过去完成的动作对现在的影响,所以选B.

选b 动词不定式完成态 表已经造成麻烦 动词不定式是非谓语 而a选项会造成谓语超过一个

I am sorry to have given you so much trouble and thank you for your help.
不定式用完成式表示动作在谓语动作之前发生,即添麻烦在道歉之前发生。

b