高中英语 Unit7 lesson4 sea stories-vocabulary学案 北师大版必修3

Lesson4 Sea Stories-vocabulary 学案 重点短语 【短语 1】watch out【课文原句】They have a huge mouth and can eat fish as big as themselves. Watch out! (Page12)【名师点拨】watch out 在这里的意思是"当心；注意",相当于 look out 或 be careful。如:You’ll catch cold if you don’t watch out. 【知识拓展】watch out 后接名词时,要与 for 连用,意为"小心……"。如:In public places everyone is required to watch out for thieves.I’m always watching out for mistakes that I may have missed before.【短语 2】all at once【课文原句】All at once, the sky was covered with dark clouds and in less than a minute we were in a terrible storm. (Page14)【名师点拨】all at once 是副词短语,相当于 suddenly,意为"突然"。如:All at once she lost her temper, which made all the people present dumbfounded(目瞪口呆).【知识拓展】all of a sudden 与 all at once 都是副词短语,都有"突然"的意思,但 all of a sudden 更强调"出乎意料地",即 unexpectedly。如:All of a sudden, the tire burst; we had to stop on half way, considering what to do.all at once 还有"同时,一下子,马上"的意思。如:On hearing the news of his illness, he drove to see him all at once.【短语 3】pick up【课文原句】In the end, a boat picked me up. (Page15)用心 爱心 专心1【名师点拨】pick 常作及物动词,意思是"选择；挑选；采；摘"。在本句中 pick sb. up 是一个固定词组,意思是"(从海里或危险处)营救,搭救"。如:She picked the best cake for herself.We picked up as many people from the burning ship as we could. 【知识拓展】1. pick up 还有其他意思:1) (开车)接人；2) 让人乘车；搭载；3) 学得:通过学习或经历获得(知识)。2. pick 还能与其他介词搭配构成固定短语,如:pick on sb. / sth. (跟某人)找别扭；故意刁难挑剔；pick sb. / sth. out 精心挑选；辨认出；pick sth. over 用心挑选；筛选。用心 爱心 专心2