I ask her （if）I could help her.为什么用IfShe （invited）me to her birthday party.为什么invite要用ed?

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Iaskher（if）Icouldhelpher.为什么用IfShe（invited）metoherbirthdayparty.为什么invite要用ed?Iaskher（if）Icouldhelph

I ask her （if）I could help her.为什么用IfShe （invited）me to her birthday party.为什么invite要用ed?
I ask her （if）I could help her.为什么用If
She （invited）me to her birthday party.为什么invite要用ed?

I ask her （if）I could help her.为什么用IfShe （invited）me to her birthday party.为什么invite要用ed?
1.if或whether都可以.连词,连接从句,同时表示选择的意义.
if I could help her是从句,意思是是否我能帮助她.
2.应为是这个邀请的动作是过去发生的,所以用过去时.

1.句子的意思是“我问她是否需要我帮助”，这里的“if”解释为“是否”的意思～～
2.加“ed“说明这个invite是过去的事情，invited是invite（邀请）的过去时～～

1。if 表示是否。我问她我是否可以帮助她
2。invited 表示动词的过去时，也就是邀请这个动作是过去发生的

第一题：if在词典中：表示条件, 假设。如果, 要是; 假如。是连词，在此句中意思是：我问她是否需要我的帮助。
第二句中则是用的invite的过去时态。我想你不清楚的应该是为什么不用现在时态，那么也许是因为有上下句的关系。但这种题型如果没有上下句的说明，那么invites和invited都可以成为正确选项。...

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