Unit3Teenagersshouldbeallowedtochoosetheirownclothes.SectionA185.allow与let：(1)allow允许，准许，不能用于祈使句的句首；allowsth允许/准许某事；allowsbtodosth允许某人做某事；allowdoingsth允许做某事；beallowedtodosth被允许做某事；allowsbsth=allowstht
Unit 3 Teenagers should be allowed to choose their own clothes.
Section A
185.allow 与let：(1)allow允许，准许，不能用于祈使句的句首；allow sth允许/准许某事；
allow sb to do sth允许某人做某事；allow doing sth允许做某事；
be allowed to do sth被允许做某事；allow sb sth = allow sth to sb使（某人）得到（某物）
(2)let让，较口语化，常用于祈使句，不能用于被动语态；let sb do sth让某人做某事.
186.被动语态：bedone 主语是动作的承受者，用by引出动作的执行者.
一般现在时态：am/is/aredone；一般过去时态：was/weredone；一般将来时态：shall/willbe done；
情态动词加动词原形：情态动词be done；现在完成时态：have/has been done；
在被动语态中，动词的非谓语形式中原来省略了to的动词不定式要把 to写出来.
Did you see Jack come into the classroom? Was Jack seen to come into the classroom?
187.sixteen-year-olds = sixteen-year-old children复合名词，十六岁的孩子
188.part-time合成形容词，兼职的，业余的，非全日制的，其反义词是 full-time全职的
189.job 与work：job可数名词，指具体的固定或临时的“工作”；work不可数名词，没有复数形式，泛指“工作”.
190.pierce动词，刺穿，刺破；get their ears peirced
get sth done（sth动作承受者）=get sb to do sth请人做某事；have sth done=have sb do sth请人做某事；
191.license (licence)名词，执照；许可证； a driver’s license = a driving license驾驶执照；
a marriage license结婚证； a business license 营业执照； a student’s license学生证；
192.否定前移：在I think (believe,suppose,expect) 从句中，如果从句有否定含义，往往把从句的否定转移到主句.其后的反意疑问句与宾语从句的主语和谓语动词保持一致.如果主句有情态动词，就不是否定前移.
