问at night是什么时态的标志

at night这个英语短语是“在晚上”的意思，这样的短语根据上下文的语境可以用不同的一般时态。

如：一般现在时态He usually watches TV at night. 一般过去时态He did his homework at night when he was a student. 一般将来时态 He hopes he will have nothing to do at night.