1、 beat beat beaten 打 3. A-B-A型(现在式和过去分词同形) come came come 来 become became become 变 run ran run 跑 4. A -B -B型 (1)在动词原形后加一个辅音字母d或t构成过去式或过去分词。 burn burnt burnt 燃烧 learn learned/learnt learned/learnt 学习 mean meant meant 意思 hear heard heard 听见 (2)把动词原形的最后一个辅音字母“d”改为“t” 构成过去式或过去分词。 build built built 建筑 len
2、d lent lent 借给 lose lost lost 失去 send sent sent 送 spend spent spent 花费(3)其他 pay paid paid 付 lay laid laid 下蛋 say said said 说 bring brought brought 带来 buy bought bought 买 think thought thought 想 sleep slept slept 睡 keep kept kept 保持 sweep swept swept 扫 stand stood stood 站 understand understood unders
3、tood 明白 win won won 得胜 shine shone/shined shone/shined 发光 catch caught caught 抓住 teach taught taught 教 feel felt felt 觉得 fight fought fought 战斗 find found found 发现 get got got/gotten 得到 hang hanged/ hung hanged/ hung 绞死 / 挂 have had had 有 hold held held 盛,握 leave left left 离开 make made made 制造 meet
4、met met 遇见 sell sold sold 卖 shoot shot shot 射击 tell told told 告诉 smell smelt/smelled smelt/smelled 嗅,闻 sit sat sat 坐 dig dug dug 挖5. A-B-C型(现在式、过去式和过去分词都不相同) (1)在动词原形后加-n或-en构成过去分词。 eat ate eaten 吃 fall fell fallen 落下 steal stole stolen 偷 give gave given 给 freeze froze frozen 冻结 take took taken 拿 se
5、e saw seen 看见 write wrote written 写 ride rode ridden 骑 drive drove driven 驾驶 throw threw thrown 抛,扔 blow blew blown 吹 grow grew grown 生长 know knew known 知道 fly flew flown 飞 draw drew drawn 拉,绘画 show showed shown 展示 (2)过去式加-n或-en构成过去分词。 speak spoke spoken 说话 break broke broken 破碎,折断 wake waked/ woke
6、waked/ waken 醒 choose chose chosen 选择 forget forgot forgotten 忘记(3)变单词在重读音节中的元音字母“i”分别为“a”(过去式)和“u”(过去分词)。 begin began begun 开始 ring rang rung 按铃 sing sang sung 唱 sink sank sunk 沉 swim swam swum 游泳 drink drank drunk 饮(4)其他不规则动词的变化。 be(am, is) was/ were been 是 be(are) were been 是 do did done 做 go wen
7、t gone 去 lie lay lain 躺 wear wore worn 穿一)比较 1.The advantage far outweigh the disadvantages.2.The advantages of A are much greater than those of B.3.A may be preferable to B, but A suffers from the disadvantages that.4.It is reasonable to maintain that .but it would be foolish to claim that.5.For al
8、l the disadvantages, it has its compensating advantages.6.Like anything else, it has its faults.7.A and B has several points in common.8.A bears some resemblances to B.9.However, the same is not applicable to B.10. A and B differ in several ways.11. Evidently, it has both negative and positive effec
9、ts.12. People used to think ., but things are different now.13. The same is true of B. 14. Wondering as A is ,it has its drawbacks.15. It is true that A . , but the chief faults (obvious defects )are .二)原因1.A number of factors are accountable for this situation.A number of factors might contribute t
10、o (lead to )(account for ) the phenomenon(problem).2. The answer to this problem involves many factors.3. The phenomenon mainly stems from the fact that.4. The factors that contribute to this situation include.5. The change in .largely results from the fact that.6. We may blame .,but the real causes
11、 are.7. Part of the explanations for it is that .One of the most common factors (causes ) is that .Another contributing factor (cause ) is .Perhaps the primary factor is that But the fundamental cause is that .三)后果1. It may give rise to a host of problems.2. The immediate result it produces is .3. I
12、t will exercise a profound influence upon.4. Its consequence can be so great that.四)批驳1)It is true that ., but one vital point is being left out.2) There is a grain of truth in these statements, but they ignore a more important fact.3) Some people say ., but it does not hold water.4) Many of us have be
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