can.may.must.shall 等助動詞

Question

標題這些助動詞

想知道

它們之間強調%數的關係

就像是

100%一定

50%may

這樣子

Update:

有其他相關的助動詞

也麻煩補充一下

Answer 1

Favorite Answer

Can ( 100% ):

You use it to ask someone's ability of doing something. Do not use it for asking for permissions.

ex. Can you type?

May ( 50% ) :

Please use this to ask for permission.

ex. May you type this page for me?

Must ( 100% ):

It means "have to" but its tone and emphasis are stronger than "have to"

ex. I have to go home. ( I want to go home, but if I didn't go home, my parents may or may not ground me. )

ex. I must go home. ( I may or may not want to go home, but if I didn't go home now, my parents would ground me for sure. )

Shall ( 80% - 100% ) :

It means "will", as the future tense usage of "should".

When you make a suggestion to do something in the future, either "near future" or a "far far far away future".

ex. Shall we dance? ( it suggests that we should dance and we will dance together. )

It is usually used to compare with "should"

Should ( 50%):

It means "maybe"

ex. Should we dance? ( maybe it is a good idea that we dance or maybe it is not. It is really up to you. )