i believe i can fry和i think that you will pass the exam.这2句话都是宾语从句,为什么第一句话不用加that 而第二句要呢

问题描述:

i believe i can fry和i think that you will pass the exam.这2句话都是宾语从句,为什么第一句话不用加that 而第二句要呢

两个宾语从句都是that引导的,但that可以省略
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