I think it is good for me.I think it necessary to…… it后什么时候有is

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I think it is good for me.I think it necessary to…… it后什么时候有is

I think it is good for me.I think it necessary to…… it后什么时候有is
I think it is good for me.I think it necessary to…… it后什么时候有is

I think it is good for me.I think it necessary to…… it后什么时候有is
1,it在整句中作宾语,(you是主语,think是谓语). 2,necessary是宾补,补充it 3,it其实是形式上的宾语(在整句形式上看是宾语(,实际宾语是:togivehimaletter这个不定式.it是代替这个不定式的(为避免头重脚轻,就是说宾语太长了). 4,如果用itisnecessary,那又是主谓宾了,就是句子了,也就是宾语从句.这里think后面得宾语从句要加that引导. Doyouthinkthatitisnecessaryformetogivehimaletter.也是可以的.