fall behind with sb 和 fall behind with sth 的意思分别是什么?

fall behind with sb 和 fall behind with sth 的意思分别是什么? 有没有fall behind with sb.这个短语? fall behind If you fall in love with sb, 有fall in love with sb deeply,那可不可以说fall in deep love with sb? fall in love with sb 中fall 什么动词?1.fall在这里是实意,2.用fall in love with sb 造个疑问句.. fall behind的同义词 fall behind是什么意思 fall behind是什么意思 fall behind是什么意思 Fall in love with [sb] 的中文意思是什么?Fall in love with [sb] 的中文意思是什么? fall into asleep with sb和sleep with sb可以换用吗?口语中thanks 我想知道love sb和be in love with sb和fall in love with sb 的区别, fall off fall over fall behind fall down 区别的 有没有fall in love with doing sth.平时我们见的是 fall in love with sb./sth. fall behind等于哪些词 We all helped him with his English so he didn't * with his study.*处应选哪个答案：A:fall off B.fall down C.fall behind D.fall over fall in love with 意为爱上..后接sb/sth吗?具体怎么用啊