过去分词怎么分辨？

怎么分辨哪些直接加ed，哪些是不规则？ 还有，麻烦写出un.less之类的词和具体意义用法。

1. 一般情况下，动词词尾加 -ed ，如： worked played wanted acted
2. 以不发音的 -e 结尾动词，动词词尾加 -d，如： lived moved decided

3. 以辅音字母 + y结尾的动词，把-y变为-i 再加-ed，如： studied tried copied

4. 以一个辅音字母结尾的重读闭音节动词，双写词尾辅音字母，再加 -ed，如： stopped begged fretted

动词的过去分词或者过去式大部分遵循以上规则加ed。不规则的不是很多，但只能死记硬背。

不过大致可分为以下几种，便于记忆：

(一) 不变

1.cut cut 2.let let 3.put put 4 read read 5．must must

（二）改成a

1. come came 2.become became 3. begin began 4. drink drank

5.have had 6.run ran 7. sit sat 8.ring rang

9. sing sang 10.swim swam 11.give gave

（三）改成ght

1. think thought 2.fight fought 3.bring brought 4. buy bought

5. catch caught 6. teach taught

（三）改成t

1.keep kept 2.sleep slept 3.sweep swept 4.feel felt

5.spend spent 6.learn learnt 7.mean meant

（四）改成ew

1.blow blew 2. know knew 3.grow grew 4. draw drew

5.throw threw 6. fly flew

（五）改成o

1.get got 2.forget forgot 3.write wrote 4.ride rode 5.drive drove

6.sell sold 7.tell told 8.stand stood 9.understand understood

10.speak spoke 11.hear heard 12.take took

(六)其他形式

1.make made 2.hear heard 3.eat ate 4.mean meant

5.say said 6.find found 7.meet met 8.see saw

9.can could 10.shall should 11.will would 12. may might

13.go went 14.see saw 15.wear wore

un是表示反义的前缀 pref.

1.

表示"做相反的动作"
Who unlocked the door?
谁开了门上的锁? 2. 表示"不","非","无","相反"
His proposal is unacceptable.
他的建议无法接受。 3. 表示"使自由","除去","从...取出"
Some historical relics were unearthed.
数件历史文物被挖掘出来。 4. 表示"使丧失","使分离","免去"
The thief was unmasked.
该贼的真面目被揭露了。 5. 表示"彻底","完全"
He used to have unlimited power.
他曾拥有无限的权力。

2. less little的比较级，可做形容词和副词。意为：较小，较少的/地

亦可做名词表示更少的数量。同时也是表示没有或不能的后缀，通常用在动词或名词后 如：valueless tireless

不规则的需要逐个记忆

un是一种前缀，表否定。如：like ,unlike,happy,unhappy

less 是一种后缀，表示没有，无 care careless,home ,homeless

这些还有许多，需要逐步积累，逐步记忆

你说的有些矛盾，能在说清楚点么？