be behind

• 延后, 落后

be behind的用法和样例：

例句

1. He had been ill for a long time and consequently he was behind in his work.
   他病了很久，因此耽误了功课。
2. The team was behind, but at the last minute Sam saved the day with a touchdown.
   这个队落后了，但在最后时刻塞姆底线得分转败为胜。