adj.+for/ofsb.todosth.for:adj.多为描述不定式行为的特征(important/necessary/interesting等.)of:adj.多为描述主语(人)的品质特征(kind/nice/friendly/wise/foolish等.)作主语Itiseasy_______hertolearnEnglishwell.Itisclever________youtosolvetheproblem.offor2、Ittakessb.sometimetodosth.Ittakesmethreehourstofinishthehomeworkeveryday.作主语我每天花去三个小时完成家庭作业。Ispendthreehoursfinishingthehomeworkeveryday.3、Itis+n.(forsb)todosth.Itismypleasure/duty/jobtohelpyouwithyourEnglish.作主语4、用在谚语中Toseeistobelieve.Tosayiseasy,buttodoishard.作主语1、Itisnecessary______ustolearntowait.(of/for)2、Itwascareless______metobreakthecup.(of/for)3、Ittookthem1,000yuan_________thistable.(buy)4、Itismypleasure_________theboxforyou.(carry)tobuyforoftocarry练习5、轮到我们打扫教室了。Itisourturn_________________________6、Towastetimeistoshortenlife.(翻译成中文)tocleantheclassroom.浪费时间就是缩短生命。练习
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