第1个回答 2011-02-20
It seemed (that) he knew what he was doing.
一般现在时也可以
第2个回答 2011-02-20
It looks like he knows what he is doing.
第3个回答 2011-02-20
It looks like he knows what he is doing..
第4个回答 2011-02-20
It seems that he knows what he is doing
it seems that 似乎;看来好像本回答被提问者采纳