三年级英语下册语法知识解读

1. 介词“on?” “in?”的短语

　on the chair/in the pencil-box/in the desk/in the bag/in the sky

　2. 特殊疑问句“where”“what”“who”的用法

　①特殊疑问句“where”的用法：

　Where is …? ----It?s on…. / It?s in….

　②特殊疑问句“what”的用法：

　What?s on the table? — A plate of cakes.

　③特殊疑问句“who”的用法：.

　Who is he/she? He/ She is….

　They are brother and sister.

　当不知道是谁时，人称代词用it:

　Who is it? ----- It?s me.

　3. 感叹句用what和how： what修饰名词;how修饰形容词

　How nice on a ship! How nice!

　What a fine day! What a big cake!

　4.let’s 句型：

　let?s =let us

　Let?s make a blouse/vest.

　Let?s run a race. /Let?s play games.

　Let?s ride it.

　Let?s give her nice things.

　Let?s sing“Happy Birthday to You”.

　Let?s count the candles.

　Let me help you.

　Let me open/close the door.

　Let me get the apples/pears.

　Let?s go home.

　5. can句型：

　We can?t let him in.

　She can’t swim.

　I can?t find/see….

　Can she swim? Yes, she can. / No, she can’t.

　Can you make cakes? Yes, I can. / No, I can?t.

　Can you fly it? —Of course，I can.

　6.主语是单数第三人称，谓语动词加“s”：

　look like 看起来像

　She looks like Steve.

　Steve is Eve’s brother.

　I like him, and he likes me.

　7.“have”的用法：

　①“have”表示“有”

　I have a kite/ a new bike.

　We have some nice things for you.

　②“have”表示“吃”

　Have a coke/an apple. —Yes, thank you./ No, thanks.

　Please have the cake. —Thank you.

　Let?s have the good things.