please explain why好就追加分

不懂的，你再短我

1.He'd never be able to live with himself if he allowed anything to happen to her.(这个句子是什么意思)
如果她发生了什么事（有什么不测），他不会原谅自己的。

2.The people __ on the stage all play different instruments.(请解释为什么选其中的答案)
A.to perform B.perform C.performing D.performed
C,动名词做后置定语
3.If it __ for the help of our teacher, we would not have made so much progress.(不明白怎么做)
A.were not B.has not been C.isn't D.had not been
A,表示先前假设

4.How nice it __ she here! But to our disappointment, she is ill today.(没见过这样的题)
A.is would be B.were would be C.would be is D.would be were
C,今后你就知道了

5.It is hard for us to imagine what Jay would be today if he __ Mr. Wu.(详细解释,谢谢)
A.wouldn't have met B.hadn't met C.didn't meet D.were to meet
B，假设下的完成时

1 如果她发生了什么事，他不会原谅自己的。
2 d 排除法。a 前面要接动词。b 要第三人称单数。c 缺少主动词。
3 a 虚拟语气
4 c 首先整句话是虚拟语气，she were here 采用倒装！
5 b 还是虚拟语气！好好看看语法书吧！

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