懂英语的请进,How long were they playing football yesterday?

懂英语的请进,How long were they playing football yesterday? They s___ they were playing football against Class Three. they were playing volleyball on the beach yesterday. I saw the boys who were playing football yesterday who were They're playing football.的问句是什么? ________are they playing football? They（ were playing football ）at that time.(对括号部分提问） ( ) were I saw the students who were playing football yesterday 这个是定语 英语问答 How long were you away? They are playing football the day before yesterday.这句话错了吗?怎么 They are playing the football还是They are playing football? they a___ like playing football