Chapter 2 Educational visits
（2）在suggest，demand，order，propose，insist，command，request，desire等動(dòng)詞后的賓語從句中，謂語動(dòng)詞用“should + 動(dòng)詞原形”，表示建議、要求、命令等。如: i demand that he （should） answer me immediately. 我要求他立刻答復(fù)我。
3、虛擬語氣在狀語從句中的用法
（1）在帶有even if/ even though引導(dǎo)的讓步狀語從句的主從復(fù)合句中，主句和從句都用虛擬語氣，動(dòng)詞形式與含有非真實(shí)條件句的虛擬語氣相同。如: even if he had been ill, he would have gone to his office. 即使生了病，他都去辦公室。
（2）由as if或as though引導(dǎo)的狀語從句表示比較或方式時(shí)。從句謂語形式為動(dòng)詞的過去式（be用were）或 “had+過去分詞”。如: he treated me as if i were a stranger. 他那樣對(duì)待我，好像我是陌生人似的。she talked about the film as if she had really seen it. 她談?wù)撃遣坑捌秃孟袼_實(shí)看過一樣。
注:如果表示的事情可能會(huì)發(fā)生，那么方式狀語從句中的謂語動(dòng)詞可用陳述語氣。
（3）在in order that或so that引導(dǎo)的目的狀語從句中，謂語動(dòng)詞多用 “could或might（有時(shí)也用should）+ 動(dòng)詞原形”。如: mr green spoke slowly so that his students could （might） hear clearly. 格林先生說得很慢，好讓學(xué)生聽清楚。
4、虛擬語氣在定語從句中的用法：在 “it is time （that） …”句型中，定語從句的謂語動(dòng)詞常用虛擬語氣表示將來，動(dòng)詞形式一般用過去式，意思是“該干某事的時(shí)候了”。如: it’s （high） time we did our homework. 我們?cè)撟鲎鳂I(yè)了。
5、虛擬語氣在簡(jiǎn)單句中的用法
（1）情態(tài)動(dòng)詞的過去式用于現(xiàn)在時(shí)態(tài)時(shí)，表示說話人的謙虛、客氣、有禮貌，或委婉的語氣，常見于日常會(huì)話中。如: it would be better for you not to stay up too late. 你最好別太晚睡覺。
（2）在一些習(xí)慣表達(dá)中。如: i would rather not tell you. 我寧愿不告訴你。
（3）用“may + 動(dòng)詞原形”表示“祝愿”、“但愿”，此時(shí)may須置于句首（多用于正式文體中）。如：may you be happy!祝你快樂！may good luck be yours.祝你順利。
（二）寫作練習(xí)
p26 writing a letter of invitation
dear tammy
i am the secretary of our school’s junior geography club. we meet in room 7 every wednesday afternoon at 4.30. we are studying new zealand this term. everyone in our club would like to know more about it.
i read your article about new zealand in our school newspaper. it was very interesting. i am writing now to invite you to give a talk to our club. we would like to hear more about your visit, and see your photographs of new zealand.
we will have meetings on march 12th, 19th and 26th. i hope you will be able to come on one of those dates. if you can come, please write and let me know which date is best for you.
i look forward to hearing from you.
yours sincerely
wendy wu