小学阶段英语学习必须掌握的四种时态
二、现在进行时
含义：表示说话人说话时正在进行或发生的动作，也可以表示当前一段时间内的活动或现阶段正在进行的动作。常与now连用。
构成：主语 （am /is/ are） 动词ing （现在分词） 其他
如：
1.表示说话时正在进行的动作
常和now连用，有时和动词如look，listen等连用，表 示“现在”这一概念。
Julia is cleaning the window now.
Look. Sally is reading an email.
Listen. She is singing in the classroom.
2.表示现阶段正在进行着的动作
现阶段正在进行着的动作，不一定指说话时正在进行着的动作。常和at present（目前），this week（本周），these days（这几天）等时间状语连用：
We are looking for a house for rent these days.
3.有些非持续性动词可用现在进行时表示动作即将进行或发生。
Christmas is coming.
Summer vacation is coming.
Spring is coming.
注意：1.be动词（am, are, is)的用法
动词的ing形式（现在分词）
主语 be动词 动词ing 例句
第一人称I am dancing I am dancing.
第二人称You are dancing You are dancing.
第三人称she，he，it is dancing She is dancing.He is dancing.It is dancing.
所有人称复数we，you, they are dancing We are dancing.You are dancing.They are dancing.
动词ing形式（现在分词）的变化规律
1、一般情况在词尾 ing
如：jump-jumping sing-singing
boat-boating play-playing
read-reading cook-cooking
sleep-sleeping fly-flying
walk-walking climb-climbing
watch-watching do-doing
find-finding speak-speaking
wait-waiting grow-growing
study-studying
2、不发音的e结尾的动词, 去e ing
如：ride-riding skate-skating
have-having dance-dancing
come-coming make-making
close-closing smile-smiling
write-writing
3、重读闭音节且末尾只有一个辅音字母的动词,双写最后的辅音字母 ing
如：run-running swim-swimming
get-getting
小练习：
( )1.Look! Ben ____ TV in the living room.
A.is watching B.will watch C.watches
( )2.The children are_______ football.
A.playing B.plays C.played
( )3.I _____ watching TV?
A.is B.am C.are
( )4.Kate is________the window.
A.clean B.cleans C.cleaning
( )5.My brother is ________in the sea.
A.swiming B.swims C.swimming
【参考答案】AABCC
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