人教版高中英语选修八 Unit 5 Meeting your ancetors4课件.ppt

; Revision;1. identify vt. 确认，识别，鉴别 （1）~ sb. /sth. as sb./ sth. 确认，证明某人/某物系某人/某物 e.g. 她认出那个男子就是袭击她的人。 She identified the man as her attacker. （2）~ sth. with sth. 认为某事物与另一事物等同 e.g.幸福与财富不能混为一谈。 One can’t ~ happiness with wealth. 扩展：identification n. 验明，鉴别，身份证明 identification card 身份证 identical adj. 完全相同 be identical to/with;2. alternative adj. 供选择的,其他的 n. 可能的选择;选择对象 e.g. The way was blocked ,so we had to go by ~ road. 这条路阻塞，我们只能走其他路。 have no ~ but to do sth.别无选择只好做… = have no choice but to do sth. = have nothing to do but do… 除了做某事别无选择 There is no alternative...……别无选择 have the alternative of doing sth 有做…的选择,可以做 alternative energy替代能源 an alternative to...……的替代品 e.g. 除了放弃那个计划，我别无选择。 I have no alternative but to give up the plan. = I have no choice but to give up the plan. = I have nothing to do but give up the plan.;易混辨异 alternative, choice, selection (1)alternative一般强调在只有两种可能性或者行为方式之间进行的选择。 An unhappy alternative is before you.Your mother will never see you again if you do not marry Mr.Collins,and I will never see you again if you do. 摆在你面前的是个很不幸的难题，你得自己去选择。如果你不嫁给柯林斯先生，你母亲就再也不想见你，而如果你要嫁给他，我就再也不愿见到你。 (2)choice泛指从一组人或物中进行的自由选择，指“选择，挑选，抉择”。 The store offers a wide choice of fruit and vegetables.商店提供许多可供选择的水果和蔬菜。;;;3.accuracy n.精确；准确 _____________ adj. 精确的；准确的 _____________ adv. 精确地；准确地 _____________ n.错误; ⑴ Sometimes a person suffering a loss gives incomplete，or even ___________ (accurate) information. ⑵ Keep an English-English dictionary handy，and when you can’t interpret a word _______ accuracy，you may refer to it any time. ⑶___________ is the first thing. To get an __________number，we must measure ______________. (accurate) ;4. interrupt vt. Vi.打断…讲话;打岔；暂时中断、中止 1)阻断, 中断 His studies were interrupted by the war． Don’t interrupt him, for he hasn’t finished yet. The war interrupted the trade between the 2 countries. Sorry to interrupt you, but I have something to say. interrupt sb. /sth. with sth. 用…打断 He interrupted h