英语：1.they were surprised to find that was a lovely cat.he found that she was happy yesterday.

两个that语法不一样,第一个是代词,指代cat,第二个是关系代词,引导宾语从句的,在从句中无词义无成分,可省略decide表过去的时候用过去时,动作如果不是发生在过去,当然不是过去时啦,比如In the next meeting,they will ....they were surprised to find that was a lovely cat。这句中的 that was a lovely cat不是做 find 的从句吗？能不能这样表达.they were surprised to find that that was a lovely cat.期待你的回答.they were surprised to find that was a lovely cat这句就是省略了that的宾语从句，that引导宾语从句时，无词义无成分，所以不能充当主语，所以这里的that不能当做关系代词，因为was前缺主语they were surprised to find that that was a lovely cat.这样表达是可以的，但是呢，因为英文一般要避免重复，所以第一个that一般会省略哒~