反义词是stand,例如:

1、She was standing on one foot.她单脚站立着。

2、Stand with your arms by your side and your head erect.手放两边,昂首站立。

3、We stood up in order to get a better view.我们站起身来以便看得更清楚。

4、Everyone would stand up when the teacher entered the classroom.老师走进教室时大家都会起立。