高中英语教学课件：选必一U5 Learning about language-长中.pptx

As a witness to farmers’ ___________ and even _______________ food, Yuan Longping was determined to _______ his life __ tackling this crisis. After graduation, he realised what farmers needed most was to _______________________. Yuan was convinced that the answer lay in the creation of hybrid rice, one of whose characteristics is that it usually achieves higher output than __________ crops. However, it was no easy job. The first difficulty he needed to overcome was scientists’ ________________ that this could not be done. _________failing numerous times, Yuan managed to generate this incredible crop with ___________. It is estimated that about 60 percent of domestic rice consumption in China ______________ crops generated from Yuan’s hybrid strains. Not only has his invaluable innovation enabled Chinese farmers to greatly expand their output _____it has helped feed the world. poor harvests a severe shortage of devoteto boost yields in the fieldscommon assumptionDespiteis comprised ofconventionalintense effortbutReview Lead in(1)句①中黑体部分在整个句子中作主语, 句子作主语, 称为_____从句。(2)句②是__作形式主语, that从句作真正主语。(3)句③中黑体部分作 _____, 称为主语从句，语序为_________.主语it主语陈述语序 Who will take part in the meeting has not been decided.How he became a great scientist is known to us all.Whether they would support us was a problem.That he is still alive is a good news to us.When they will start is not known yet.Why he was late is not important now.Where she is from is unknown.What she said is true.what, who, whom, whose, which, wh+everthat, whether when, where, how, why引导主语从句的关联词 That Yuan had realized his dream of seawater surprised the whole world.Whether it was possible to develop hybrid rice was a matter of great debate.that _______成分，____意义，______省略。whether _____成分，____意义，译为_____。结论：不做是否无不能不做有引导主语从句的连词 It surprised the whole world that Yuan had realized his dream of seawater. That Yuan had realized his dream of seawater surprised the whole world.形式主语为避免 “头重脚轻”, 常用 it 作形式主语, 而把从句放在后面 Practice:1.That the