参考书上些的是We found it very difficult to learn a foreign language well.为什么不是 We found it was very difficult to learn a foreign language well.这样从句的主谓宾不都全了吗？
very difficult to learn a foreign language well是it的宾语补足语如果是 We found it was very difficult to learn a foreign language well.这句话就存在2个主语了，你说主语是we呢还是it呢？...
