规则动词的词形变化
(1)陈述语气第三人称单数一般现在时形:
(a)原形动词词尾+-s:
help(帮助)helps
come(来)comes
(b)原形动词词尾ch,sh,o,s,x+-es:
teach(教)teaches
wash(洗)washes
go(去)goes
kiss(吻)kisses
fix(安装)fixes
(c)原形动词词尾为辅音字母+y时,去y后加-ies,若是元音字母+y,只加-s:
study(学习)studies
play(游戏)plays
解说:本项规则的第三人称单数是指句子的主语。例如:
I go to school on a bicycle every day .
You go to school on a bicycle every day.
She goes to school on a bicycle every day.
(2)现在分词(也称-ing形):
(a)原形动词词尾+-ing。
speakspeaking(说)
studystudying(学习)
gogoing(去)
(b)原形动词词尾为-e时,去-e后+-ing。
liveliving(住)
makemaking(制造)
(c)原形动词词尾为-ie时,先把-ie改为-y后+-ing。
lielying(卧,躺)
diedying(死)
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