Modal Verbs are used to
show obligation.
There are two modal
verbs used for
obligation: Must and
Have to.
The lesson below
teaches you how to
show obligation with
modal verbs.
Must
Must is for simple present. It usually shows general
obligations, like in these examples:
Travelers must show their passport before boarding a
plane.
You must use a pencil on the test.
It is formal and normally used in writing. Notice how this
example is formal:
All employees must wear proper safety equipment.
Have to
Have to is not an actual modal verb, but it is used like a modal.
You must conjugate the verb "have" depending on the time
and subject.
I have to work tomorrow.
She has to work tomorrow.
It is used in all tenses.
I had to work last night.
She has had to work every day this week.
"Have to" is less formal than "Must", so it is more common in
conversation.
Must not and Don't have to
"Must not" and "don't have to" are completely different, but
their meanings are often confused.
"Must not" is a negative obligation and shows something that
is prohibited, like in these examples:
You must not eat in the computer room. (Food in the
computer room is prohibited.)
"Don't have to" shows something that is not necessary.
I don't have to work today. (Working is not necessary.)
Now that you have learned about obligation with modal verbs,
are you ready for some tests? Try these below:
- See more at: http://www.learnenglish-online.com/grammar/modals/obligation.html#.dpuf
Modal Verbs are used to show obligation.There are two modal verbs used for obligation: Must and Have to.The lesson below teaches you how to show obligation with modal verbs.MustMust is for simple present. It usually shows general obligations, like in these examples:Travelers must show their passport before boarding a plane.You must use a pencil on the test.It is formal and normally used in writing. Notice how this example is formal:All employees must wear proper safety equipment.Have toHave to is not an actual modal verb, but it is used like a modal.You must conjugate the verb "have" depending on the time and subject.I have to work tomorrow.She has to work tomorrow.It is used in all tenses.I had to work last night.She has had to work every day this week."Have to" is less formal than "Must", so it is more common in conversation.Must not and Don't have to"Must not" and "don't have to" are completely different, but their meanings are often confused."Must not" is a negative obligation and shows something that is prohibited, like in these examples:You must not eat in the computer room. (Food in the computer room is prohibited.)"Don't have to" shows something that is not necessary.I don't have to work today. (Working is not necessary.)Now that you have learned about obligation with modal verbs, are you ready for some tests? Try these below:- See more at: http://www.learnenglish-online.com/grammar/modals/obligation.html#.dpuf
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