人教新目标九年级 语法透视含情态动词的被动语态1.含情态动词的被动语态的基本结构为“情态动词+be+及物动词的过去分词”。Many trees should be planted on the mountains. 应该在树上植多树。Students should be allowed to go to school by bike.应该允学生们骑自行车上学。2.把含情态动词的主动句变成被动句，即把“情态动词+动词原形”改为“情态动词+be+过去分词”，此时，作主语的要用动词承受者。We should clean the classroom every day. →The classroom should be cleaned every day. 3.句式的转换(1)否定句：在情态动词后加not就行。These books can’t be read for children. 这些书孩子们不能读。(2)一般疑问句：直接将被动语态的述句的情态动词提到的句首。Should Ann be allowed to wear her own clothes? 应该允安选择自己的衣服吗？(3)特殊疑问句：由疑问词加上含有情态动词的被动语态的一般疑问句构成。When must my homework be handed in? 我的必须时交？4.对含有情态动词的被动语态的一般疑问句的回答， 一般应保留原句中的情态动词，但must表示“必须”时，其否定回答用needn’t。—Should my homework be finished today? 我的应在今天完成吗？—Yes, it should./No, it shouldn’t. 是的，应在今天完成。/不，不应在今天完成。—Must the room be cleaned right now? 房间必须马上打扫吗？—Yes, it must./No, it needn’t. 是的，必须立即打扫。/不，不必立即打扫。典例题解〖例1〗Teenagers should to choose their own clothes. A. allow B. to allow C. be allowed D. allowed〖〗C。主语teenagers是动作allow的承受者，再根据should确定要用情态动词的被动语态，即“情态动词+be+过去分词”。〖例2〗-What should we do first if we want to develop our village?-A lot of n |
