他看起来没明白。 他看起来是我弟弟。 他看起来哭了。 他看上去很困。 他看上去很老。 旅游的时候他经常尝试不同的当地菜。

他看起来不明白。He seems to not understand 我会用：他似乎没明白 他看起来没明白。He didn't seem to understand 他不像明白了的。 他看起来是我的弟弟。It seems tha he's my younger brother. 他看起来像我弟弟 他看起来哭起来。He seems to begin to cry. 他眼瞅着就要哭了 他看上去困乏极了。He looks exhausted. 他看起来很疲惫 他看上去老。He looks old. 他很显老。 旅行的时候他常常尝尝各种国家饭菜。When he's travelling, he often tastes different national dishes. 你写的很正宗。

他似乎不是很明白。He seems to not understand 他似乎没懂。He didn't seem to understand Both of above sentences is right,it just in different way to say it out 他看起来是我的弟弟。It seems tha he's my younger brother. 他似乎开始哭了。He seems to begin to cry. 他看上去累极了。He looks exhausted. 他看起来很老。He looks old. 当他旅行的时候,他经常品尝不同国家的菜肴。When he's travelling, he often tastes different national dishes. Tips:I think that seem this word can be translated in different chinese words to get sentences sound better. seem:看上去，似乎，看起来，好像，仿佛 It seems that it is my toy car which one I have lost.这个玩具汽车似乎是我丢了的那个。 He seemed to be asleep.他好像睡着了 you seem happy to play piano. 你好像很喜欢弹钢琴。