在周末 ..这几种表达都对么?1 你星期几去见那个女孩?2 我打算这个周末去见那个女孩3 我周末才有空,平时你还是别来找

1.Which day do you want to see the girl?
2.I want to meet the girl this weekend.
3.I only have time on weekends,you don't come to see me on ordinary days.
4.I will be off tomorrow,let's fish/let's climb.
5.这三个词组都是对的.on weekend 是“在一个周末”.on weekends是“在许多个周末”,用的是复数形式的.而on the weekend是指“（指定的)在一个周末".
at the weekend和 at weekends都是错误的,weekend或weekends前用介词on不能是at.
希望我的回答能对你有帮助.——一位酷爱英语的学生啦

没有on weekend，一般后面都有加S ,on weekends 表示“在周末”，是泛指，而on the weekend 表示“在周末，在这个周末”，是特指。两者不能完全打等号.
at the weekend, at weekends 都是表达一个意思，at和on都可以用在这里



希望对你有用

1. Which day do you want to see the girl?
2. I want to meet that girl this weekend.
3. I only have time on weekends, you don't come to see me on ordinary days.
4. I will be off tomorrow, l...