it appeared that he didn't know what was happening=he()()to know what was happening
问题描述:
it appeared that he didn't know what was happening=he()()to know what was happening
答
应该填写
didn't appear
或
appeared not
两个都可以
似乎他不知道发什么了什么.
其否定形式为appeared not to do 或 didn't appear to