4、行为动词
就是我们平时上课时说的动词，表示某一动作或行为。如：sweep、live等。
行为动词我们已学过它们的四种形式：原形、第三人称单数+s/es、现在分词（也叫动名词）+ing、过去式+ed。
（1）动词第三人称单数变化规则：
A、一般直接加“s”，如：play – plays, visit – visits, speak – speaks ；B、以“s”，“x”，“sh”，“ch”结尾时，加“es”，如：catch – catches, watch – watches ；
C、以“辅音字母+y”结尾时，变“y”为“i”再加“es”，如：carry – carries, study – studies 。
（2）现在分词（动名词）构成规则：
A、一般直接加“ing”，如：go – going, do – doing, look – looking ；B、以不发音的“e”结尾的单词，去“e” 加“ing”，如：take – taking, make – making, have – having ；C、以重读闭音节结尾的词，如末尾只有一个辅音字母，需要双写这个字母再加“ing”，如：put – putting, stop – stopping, run – running, get – getting, swim – swimming, sit – sitting, begin – beginning, jog – jogging, forget – forgetting 。
（3）过去式构成规则：
A、一般直接加“ed”，如：plant – planted, visit – visited, pick – picked ；B、以不发音字母“e”结尾，直接加“ed”，如：like – liked, hope – hoped, taste – tasted ；C、以“辅音字母+y”结尾时，变“y”为“i”再加“ed”，如：try – tried, carry – carried, study – studied ；D、有些动词要双写最后一个字母，再加“ed”，如：stop – stopped ；E、还有很多动词的过去式是不规则的，请记忆：是-am(be)-was-being；是-are(be)-were-being；是-be-was, were-being；成为-become-became-becoming；开始-begin-began-beginning；弯曲-bend-bent-bending；吹-blow-blew-blowing；买-buy-bought-buying；能-can-could-----；捕捉-catch-caught-catching；选择-choose-chose-choosing；来-come-came-coming；切-cut-cut-cutting；做-do, does-did-doing；画-draw-drew-drawing；饮-drink-drank-drinking；吃-eat-ate-eating；感觉-feel-felt-feeling；发现-find-found-finding；飞-fly-flew-flying；忘记-forget-forgot-forgetting；得到-get-got-getting；给-give-gave-giving；走-go-went-going；成长-grow-grew-growing；有-have, has-had-having；听-hear-heard-hearing；受伤-hurt-hurt-hurting；保持-keep-kept-keeping；知道-know-knew-knowing；学习-learn-learned, learnt-learning；允许，让-let-let-letting；躺-lie-lay-lying；制造-make-made-making；可以-may-might----；意味-mean-meant-meaning；会见 -meet-met-meeting；必须-must-must----；放置-put-put-putting；读-read-read-reading；骑、乘-ride-rode-riding；响、鸣-ring-rang-ringing；跑-run-ran-running；说-say-said-saying；看见-see-saw-seeing；将-shall-should----；唱歌-sing-sang-singing；坐下-sit-sat-sitting；睡觉-sleep-slept-sleeping；说-speak-spoke-speaking；度过-spend-spent-spending 。
…… …… 余下全文
