99uu优优娱乐官方网站_99uu优优娱乐官方网站注册_99uu优优娱乐手机版登录

时间:2018-10-21 英语知识 我要投稿
  现在进行时由“am / is / are + 现在分词”构成。如:  I’m studying at Yu Cai Senior Middle school. 我在育才中学读书。  He is writing on the desk. 他再课桌上写字。  They are talking about their visiting the Great Wall. 他们在谈论游长城的事情。  【说明】动词现在分词的构成方法:  (1) 一般在动词后加-ing。如:say—saying, play—playing, think—thinking, study—studying, teach —teaching, blow—blowing, build—building.  (2) 动词若以-e结尾, 则去e再加-ing。如:love—loving, make—making, guide—guiding, date—dating.  (3) 在以单短元音的重读闭音节结尾,且末尾只有一个辅音字母的动词后,双写最后一个辅音字母,再加-ing。如:begin—beginning, regret—regretting, plan—planning, ban — banning.  (4) 在以ie结尾的动词后,改ie为y,再加-ing。如:lie—lying, die—dying, tie—tying.  (5) 在以-c[k] 结尾的动词后加-king。如:picnic—picnicking, panic—panicking.
99uu娱乐官方网站