Unit4SeasonsGrammarItis+形容词+动词不定式

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,It is+形容词+动词不定式,韩岁宁,周至西宝中学,“It is+形容词+动词不定式”结构：,这个结构常用来表达对某一事件的看法。可译为“做某事 是的”。,For example:,It is interesting to have a picnic in autumn.,在秋天野餐是有趣的。,在上述句子中，句子的真正主语不是,it,而是整个动词不定式部分，即：,to have a picnic in autumn,。我们把,it,称为“形式主语”。,如图：,It,is interesting,to have a picnic in autumn,.,上述句子也可改写为：,To have a picnic in autumn is interesting.,秋天去野餐很有趣。,Practice,请同学们在课本45页找出所有含此结构的句子。,1,It is exciting,to take a trip in spring.,2,It is nice,to eat ice cream in the hot weather.,3,It is nice,to go on a picnic at this time of year.,4,It is interesting,to make snowmen.,Homework,用所给词的适当形式完成句子。,1 It is dangerous,(swim)in the river.,2,It is hard,(live)in the Moon.,3 It is,(importance)to save water.,4 It is,(excite)to watch a football game.,5 It is,(nice)to take a trip with my parents.,t,o swim,to live,important,exciting,nice,Thank you!,Byebye!,