contacted
按动作发生的方式，发生过程的长短，可把动词分为延续性动词和非延续性动词。
延续性动词：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等，可与一段时间连用，如：for 2 years, since he came here, since last year.
地理位置英文
非延续性动词：open, clo, die, begin, start, finish, come, go, borrow, lend, buy 等，不能与一段时间连用。但其否定式可以与一段时间连用。
He has lived here for 2 years. 正确
He hasn’t received her letter for almost a month. 正确
He has left for 2 years. 错误
将非延续性动词转化成延续性动词千万别学英语
Leave-be away
Borrow-keep
Buy- have
Begin,start-be on
Die- be dead
Finish/end/stop-be over
Join-be in+组织机构iu queen
abandon的用法Open/clo-keep sth open/clod
Fall ill- be ill
Get up- be up
Catch/get a cold-have a cold
Fall asleep-be asleep
Become-be
Come back-be back
Get to/arrive at/reach-be in
Put on-wear
Lo one’s job/work-be out of work/a job 1. A---A---A型（现在式、过去式和过去分词同形）
动情素动词原形（现在式）过去式过去分词cost cost cost 花费cut cut cut 割，切hit hit hit 打
let let let 让put put put 放下read read read 读hurt hurt hurt 伤2. A---A---B型（现在式和过去式同形）
动词原形（现在式）过去式过去分词beat beat beaten 打3. A---B---A型（现在式和过去分词同形）
动词原形（现在式）过去式过去分词
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。
mh是什么意思是
动词原形（现在式）过去式过去分词
burn burnt burnt 燃烧
learn learned/learnt learned/learnt 学习
provide的用法mean meant meant 意思
hear heard heard 听见startover
（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。动词原形（现在式）过去式过去分词
build built built 建筑
lend lent lent 借给
lo lost lost 失去nd nt nt 送spend spent spent 花费（3）其他
动词原形（现在式）过去式过去分词保佑的意思
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
