14. turn on, turn off, turn up, turn down
turn on/off分别指打开/关闭电灯、收音机、煤气、自来水管等；turn up/down分别指把音量或水流量调高/调低。
Peter always turns on all the lights when he comes home.
彼得回到家时总把所有的灯都打开。
15. lose, fail, beat, win
lose意为“输给某人”，固定搭配为lose to sb.；fail指“失败”或“未做成某事”；beat意为“打败”，后接sb.或某支队伍；win意为“赢得”，如赢得荣誉、地位、比赛等。
Doctors failed to save the girl's life. 医生们未能保住那女孩的性命。
16. lose, forget, leave
lose意为“丢失，失去”；forget意为“忘记”，“忘记做某事”为forget to do sth.; “leave sth.＋介词＋地点”意为“把某物落在某处”。
I left my notebook at home yesterday. 昨天我把笔记本忘在家了。
17. look for, find
look for和find都有“找”的意思。look for强调寻找的过程，而find强调找的结果。
I can't find my wallet. I'm looking for it everywhere. 我找不到我的钱包了。我正在到处找它。
18. dress, put on, wear
dress sb. 给某人穿衣服，dress sb. up 打扮某人；put on 穿上，戴上，表动作；wear 穿着，戴着，表状态，与“be in”同义。如：
The boy dressed himself quickly. 男孩快速地穿上衣服。
Mother dressed her baby in a red skirt. 母亲给婴儿穿上红裙子。
The lady dressed herself up and went to the party. 这位女士穿上盛装去参加聚会了。
Jim put on his coat and went out. 吉姆穿上大衣出去了。
Lily is wearing a red skirt today. 莉莉今天穿着一条红裙子。