9、動詞動詞表示主語的動作或狀況

動詞的類型。

及物動詞vt，其后接賓語。

eg.She wears a uniform.

不及物動詞vi，不接賓語。

eg :She can dance.

連系動詞like-v.接表語。

eg.They are nurses.

That sounds interesting.

His mother looks young.

If you keep milk for too long, it goes bad.

助動詞aux--V.接動詞原形或分詞。

eg,DO you like pandas?

He has gone to Australia.

She is looking at the cat.

情態動詞mod-v.接動詞原形。

Eg. He must go now.

You should clean the classroom after class.

有的動詞既可作及物動詞，也可作助動詞或不及物動詞，be也可作助動詞。

eg.I do my homework after class.

Do as^{1 you like.}

She is a little bit^{2 quiet.}

She is swimming now.

二)情態動詞的使用方法

can，could^{3，may的使用方法}

l .can／could

表示具備某種能力，意為能，可以，會。

eg.I can sing English songs.

Lisa cant speak Japanese^4.

She could swim when she was^{5 four years old.}

表示許：可、允許，意為可以。

eg.Can we watch TV now?

You cant play computer games in the morning.

表示請求某人做某事，意為能，可以。

eg.Can／Could you help me，please?

表示推斷可能，多用于否定句和疑問句中。

cg。it cant be true^{6.這不可能是真的。}

Where can he have gone?他或許會到哪里呢?

2.may／might

表示許可、允許，意為可以，比can更正式。

eg. May l use your pen?我可以用你的鋼筆嗎?

May l ask you a question?我可以問你個問題嗎?

表示推斷可能，用于一定句和否定句，不可以用于疑問句。

eg.Hemay be at home now.他可能目前在家。

She may not be there today.今天她可能不在那兒。

can與be able^{7 to有什么區別}

1.兩者都可以用來表示能力。

eg.I can／am able to mend^{8 the bike.}

2.can只有目前時和過去時，而be able to可用于多種時態。

eg. I will be able to come back in another few^{9 months.}

He hasnt been able to get there before dark^10.

3.can可以表示推斷，但be able to不可以。

eg.That Can't be Gina's dictionary^11.

4.can與be able to；不可以重復用

eg.他能做好這件事。

He can be able to do is well.

He can do it well.

He is able to do it well.

must與have to有什么區別

1.主客觀方面不同。

must表義務或強制，表示主觀的必要；在一定句中must還可表推斷，語氣要比may一定多。have to表需要或不能不，表示客觀的必要。

eg.We must clean the room.

We have to clean the room.

He must beat^{12 home before supper。}

2.人稱和時態不同。

must無人稱和時態的變化，一律用must十動詞原形。have to后接動詞原形，有人稱、數和時態的變化，一般目前時的第三人稱單數要用has to，過去時中要用had to，以后時中要用will have to。另外，have to還可與，情態動詞和助動詞連用。

eg: Tom must practice^{13 his guitar every day.}

The train has left.We'll have to wait for the next train.

3.否定式及意義不同。

must not=mustn't決不可／千萬不可／務必不要； dont／doesnt／didnt／wont+have to不必

eg.We mustnt tell jokes^{14 on him.大家千萬不可與他開玩笑。}

We dont have to tell jokes on him.大家不必和他開玩笑。

在對May I?作否定回答時用No， youmustnt／cant.

eg. Mayl go to the movies? NO，You mustn't

5.疑問式及回答不同。

Must+主語+動詞原形+? Yes，主語+ must.／NO，主語+neednt.

助動詞+主語+have to+動詞原形+?

Yes，主語+助動詞.／No，主語+助動詞+not.

eg.Must l go now? Yes，you must.／NO，you neednt

Does she have to go to the doctor? Yes，she does.／NO，she doesnt.