它们都是看起来像，那会有什么区别呢？
从语法上来时
look是系动词(包括look to be)，后接adj. 做表语
look like 是动词+介词的结构，后面自然要接介词宾语，因此
That looks heavy. √
That looks like heavy. X
He looks like his brother. √
He looks his brother. (这句，还是简单地认为是错的算了)
'How does she look?'
'She looks tired/sick/great/healthy....'
对
从语法上来时
look是系动词(包括look to be)，后接adj. 做表语
look like 是动词+介词的结构，后面自然要接介词宾语，因此
That looks heavy. √
That looks like heavy. X
He looks like his brother. √
He looks his brother. (这句，还是简单地认为是错的算了)
'How does she look?'
'She looks tired/sick/great/healthy....'
对