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)

【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: