Period 4　语法专题课

学习目标

　　1.Understand the sentences in the reading passages containing the -ing form as the subject and object.

　　2.Remember the basic sentence patterns which contain the -ing form as the subject and object.This will help them understand some complex sentences.

呈现新知

　　Translate these two sentences.

　　1.学习英语很重要。

　　2.我喜欢学英语。

感受新知

　　Ⅰ.Find sentences in this reading passage containing the -ing form.Read these sentences and analyze them.

　　1.Finding ways to grow more rice has been his life goal.

　　2.He saw the great need for increasing the rice output.

　　3.Yuan Longping searched for a way to increase rice harvests without expanding the area of the fields.

　　4.He doesn't care about being famous.

　　5.Spending money on himself or leading a comfortable life also means very little to him.

　　6.Just dreaming for things,however,cost nothing.

　　7.He awoke from his dream with the hope of producing a kind of rice that could feed more people.

　　Ⅱ.Let the Ss read aloud the sentences they picked out,think over and discuss with their classmates in the groups how each of these -ing forms is being used in the situation.

活动探究

the -ing form as the subject and object

　　1.作主语

　　动词-ing形式作主语时,句子有两种形式:

　　(1)动词-ing形式直接置于句首主语的位置上。

　　捉弄别人是我们万万不能做的。

　　　　　　 is something we should never do.

　　学习新单词对我来说非常重要。

　　　　　　 is very important for me.

　　(2)用形式主语it,把真正的主语--动词-ing形式移置句尾。但这种句子形式有一定的限制,作表语的只能是某些形容词或少数名词,如:useful,useless,good,fun;no use,worth。

　　和他争辩是没有什么用的。

　　　 is useless 　　　　　　　　　　　　.

　　跟你在一起工作是令人愉快的事。

　　　 is pleasant 　　　　　　　　　　　　.

归纳:常用-ing形式作主语的句型有: