4 , Be(get )used to/ look forward to / give lessons to / devote oneself to / turn to /refer to/ lead to后接名词,代词,或动词的 ing形式。1,They ______ _______ _____ ______ the safety of the passengers. (很少注意)
2,Special attention should ______ ______ ________the problem of air pollution. (特别注意)
3, we should pay attention to ____________ people living conditions. (提高)
拓展: call sbs attention to sth 叫某人注意某事
attract (draw) sbs attention 吸引某人的注意
5, Must 表示必须,肯定,强调说话人的主观意志,常用于命令,叮嘱或其他正式场合,因它没有过去式,表示过去必须 用had to 。在表推测意义时,只用于肯定式。
l Must be .
l Must be doing sth
l Must have done
6, Should 意为 应该 多指主观上有责任,有义务干某事,语气比 must 稍弱,也比 ought to弱。在实际应用中,很少去区别should / ought to 意义区别。
l should have done
I should have helped you, but I was so busy.
l should + 动词原形-------也表推测意味
1, We should speak more English.
2, Everyone should know some first aid.
7, Ought to 应该 常指有义务,责任作某事,语气比should 强烈否定式为 ought not to +动词原形.
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