I know it is necessary for you to learn another language句子成份分析一下,

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I know it is necessary for you to learn another language句子成份分析一下,

I know it is necessary for you to learn another language句子成份分析一下,
I know it is necessary for you to learn another language句子成份分析一下,

I know it is necessary for you to learn another language句子成份分析一下,
I 是主语,know是谓语,后面是一个省略that的宾语从句,it是宾语从句里的形式主语,to learn another language是宾语从句里真正的主语,is 是宾语从句里的系动词,necessary是宾语从句里的表语.

I know it is necessary for you to learn another language
意思是 我知道这对你学习一门新的语言是必须的
I know 引起宾语从句 后面 可加 that 原句省略
it is ... for sb. to do sth. 固定搭配 对某人来说做什么事是...样的。 ...通常是形容词