She wasn't happy yesterday,I think.

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She wasn't happy yesterday,I think.
要把这个句子连成一句的话,应该是：I didn't think she was happy yesterday还是I don't think she was happy yesterday?
有谁知道的,急
哪位高手可以说的明白一点,这个涉及到否定转移,也涉及到时态的问题。

i don't think she was happy yesterday.
原句中用的是现在时think,因此也要用动词现在时don,t,事态要保持一致.直译过来应是：我（现在,此时）认为她昨天不高兴.如果用过去时didn't则要译为：我（昨天就已经）认为她不高兴.

She wasn't happy yesterday,I think. I wasn't born yesterday Lucy wasn’t _____ yesterday.She cut herself. Why wasn't Lily at school yesterday?Was she ill? wasn't born yesterday U know ,I don't think she is really happy .Maybe happy is no __Mary happy today?I don't think so.She __ look happy this m I n___ that Miss Green wasn't happy this morning 我昨天不在是 I wasn't here yesterday 还是 I weren't here yesterday? it wasn't foggy yesterday. Was Janet at school yesterday?和No,she wasn`t.She was at home it seemed that she wasn't happy?的同义句转