1.at night = in the evening
2.Which subject do you like best?
= Which subject is your favorite (subject)?
= What is your favorite subject?
= Which subject do you like most?
如果你满意我的答案,这是对我们答题者劳动的尊重,多谢!谢谢你的答案，和你的热情。有些疑问：（1）at night =in the night ，这个答案是否正确。（2）这句话是否等于“which your favorite subject ?"in the night勉强可以，不过其准确意思是“在深夜”。不可以。楼主的变化句子中，连一个谓语动词都没有。谢。那在which后面加is对么？应该也可以，但是个人觉得没有What is....好。谢谢。