You look at tired today

You look at tired today
You look at tired today

You look at tired today
look at是一个短语,表示在看某某事物这个动作
这里应该写为 you look tired today,这里look做不及物动词用,表示“看起来”的意思

应该是 You look tired today

look at 是看着的意思
应是You look tired today

不能有at，可以将at改成very
You look very tired today. 你今天看上去很疲劳。

不能加at,应该是You look tired today.

去掉AT才是对的.

look 在这里应该是感官词，表示“看起来”的意思，后面直接接形容词不达意就行了。不需要at！比如：it sounds great!听起来不错！

You look tired today.这里的look 是“某人看起来（怎么样）”的意思。是个联系动词，后面的接形容词tired 作表语。
look at 是“看（某人或某物等）....”的意思。二者的意义不一样。

去掉 at,
Look at 是看什么，是动词，
而这里是说：你今天看上去很累，看上去直接用：look 或 seem,
You look tired today

You look tired today！

应把at改为like
look like意为 看起来
look at意为 看
修改后：You look like tired today.
(绝对是对的)
look是不及物动词，后面不可以直接加名词