miércoles, 12 de enero de 2011

Modal verbs

Modal auxiliaries (we are learning: CAN, COULD, MUST, SHOULD) have several special characteristics.

1. They are never used alone. A main verb is either present or implied.

I can fly an aeroplane.
He should behave.
Could you go? Yes, I will (go).

2. Modal auxiliaries have no –s in the third person singular.

I can swim.
She can swim. (NOT She cans …)
I must pass.
He must pass.
They must pass.

3. Modal auxiliaries do not have infinitives (to may, to shall etc.) or participles (maying, shalling, shalled etc.).
You cannot say to shall, to must or to may.

4. They never mix or use an auxiliar or past form.
You can't say: Will Ican? / Do you must? / You musted ...

5. They have "friends" to help them:

CAN/COULD: BE ABLE TOas in `I will be able to go with you´.
MUST/SHOULD: HAVE TO as in `He had to go because his mother told him to´

Still having doubts?

Check the theory in

Practice with some exercises in http://www.english-test.net/esl/learn/english/grammar/ei007/esl-test.php

3 comentarios:

  1. hello!

    i will be swim in my swimming pool(yo nadare en mi piscina)
    i will be able to swim in my swimming pool(yo podre nadar en mi piscina)

    ¿seria asi?

    esque no me queda muy claro, i will es para todos los verbos, i will be able to es para can ¿NO?

    un saludo :D

  2. I'll explain it today in class, but check:

    `I'm going to swim these afternoon´ planned future
    `I'll swim this afternoon´ sudden decission

    `I will be swimming in my swimming-pool´means "Estaré nadando en mi pisci"