the teacher tells us _____(be) late for school

问题描述:

the teacher tells us _____(be) late for school

not to be
这里含有固定的短语,tell sb.to do sth.让某人做某事.
其否定形式是 在不定式to 前加not tell sb.not to do sth.让某人不做某事
be late for 迟到……