拓展 stay in 留在家里；不外出 stay out不在家；在外过夜 stay behind留在后面；留下来 stay still静止不动 stay calm保持镇静

运用 用up，in，behind填空

①他熬到深夜才完成工作。 He has to stay all hours of the night to finish his work. ②下班后工作人员需要留下来把工作赶完。 Staff must stay after hours to catch up on their work. ③我们几乎每晚都待在家里作业。 He stays almost every night and do his homework.

up

behind

in