11.remember to do sth记得将要干某事(事没做)
12.remember doing sth .记得曾经做过某事(事已做)
13.在季节、月份、星期、节日、球类运动、棋类游戏的名词之前不用冠词。
14.would like to do sth 想要做某事
15.How about /What about doing sth ?= Why not do sth ?
16.It’s time for sth 该到某事的时间了
17.It’s time to do sth该到干某事的时间了
18.have fun doing sth 很高兴干某事
19.make sb do sth 使某人干某事
20.can’t afford to do sth 没有足够多钱干某事