Verbos modais: 'must', 'have to', 'should', 'should have'

(Modals: must, have to, should, should have)


Should

Nós usamos "should" para dar, ou pedir, conselho ou uma opinião no presente:

Formulário

Nós usamos "should" / "shouldn't" + infinitivo do verbo principal (sem "to")

Exemplo

I
You
He, She, It
We
They
should do more exercise.
get a new car.
shouldn't
(should not)
smoke.
spend so much money.

Should I
you
he / she / it
we
they
get more qualifications?
wear something different?

Should have

Nós usamos "should have" para dar, ou pedir uma opinião no presente sobre algo que aconteceu no passado:

Formulário

Nós usamos "should" / "shouldn't have" + o particípio passado do verbo principal

Exemplo

I
You
He / She / It
We
They
should have taken a taxi.
shouldn't have written that comment.

Should I
you
he / she / it
we
they
have worked overtime?

Pratique

Dar ou pedir conselhos usando o verbo entre parêntesis:

.
1)
He    the position. (accept)

 
2)
You    mobile phones in the classroom. (not allow)

 
3)
   we    that we cheated? (admit)

 
4)
They    work early yesterday. (not leave)

 

Have to

"Have to" é usado para mostrar que uma pessoa é obrigada a fazer alguma coisa, geralmente por uma força externa, “have to” também pode ser usado para dar a sua opinião:
A forma negativa, "don't" / "doesn't" / "didn't have to", significa que você nãoé obrigado a fazer alguma coisa.

Formulário

O presente simples de "have" + "to" + infinitivo (sem "to")
or
The past simple of 'have' + to + infinitive (without to)

Exemplo

I
You
We
They
have to leave the house early to catch the bus.
care for the children.
He / She / It has to
I
You
We
They
don't have to leave the house early to catch the bus.
care for the children.
He / She / It doesn't have to

Do I
you
we
they
have to work on Saturday?
Does he / she / it attend the conference?

I
You
He / She / It
We
They
had to leave the house early to catch the bus.
care for the children.
I
You
He / She / It
We
They
didn't have to leave the house early to catch the bus.
care for the children.

Did I
you
he / she / it
we
they
have to work on Saturday?
attend the conference?

Pratique

Dar ou pedir conselhos usando o verbo entre parêntesis:

.
1)
You    to the internet to send an email. (connect)

 
2)
Adrian    every weekend unless he wants to. (not train)

 
3)
   you    your passport at the border? (show)

 
4)
Amy    30 hours a week last year. (teach)

 

Must

"Must" também é usado para falar sobre obrigação e é usado em regras escritas e instruções: "Must" também é usado para dar uma forte recomendação:
A forma negativa, "mustn't" ("must not"), significa que você é obrigado ou recomendado a não fazer algo.

Formulário

"Must" ou "must not" ("mustn't") + infinitivo do verbo (sem "to")

Exemplo

I
You
He / She / It
We
They
must
mustn't
report the theft to the police immediately.
forget to transfer the money.

Must I
you
he / she / it
we
they
go?

Enquanto as perguntas com "must" são gramaticalmente corretas, é mais comum nos dias de hoje usar "have to" em perguntas.

Não há forma passada do "must" para obrigação:

Pratique

Dar ou pedir conselhos usando o verbo entre parêntesis:

.
1)
You    late for the train. (not be)

 
2)
We    their wedding anniversary. (celebrate)

 
3)
You    the application form in black ink. (complete)

 
4)
He    his dog chew the furniture. (not let)

 

Pratique ainda mais

Escolha a resposta correta para completar a frase: a, b, c ou d.
.
1)
You ____ remember to close the windows when you leave the house.
 

 

2)
You ____ eat fast food every day. It’s very bad for you.
 

 

3)
Maria ____ the operation but she was too scared. Now she’s very ill.
 

 

4)
Juan ____ visit Prague once a month for meetings, but he enjoys it.
 

 

5)
You ____ perform that song. It’s offensive.
 

 

6)
You ____ come with me. I’m happy to go alone.
 

 


Create a free Getting Started account


Related links

The following exercises include use of this grammar structure:
 
 You might also be interested in:
 

Vocabulary
 

Vocabulário


Vocabulary exercises:Aumente seu vocabulário utilizando nossos três treinadores de vocabulárioPractice your spelling using our three spelling tests:Practice vocabulary relating to graphs and charts:
Aprenda vocabulário
Reading exercises
 

Reading exercises



Improve your reading skills:
 
Go to reading exercises
Video lessons
 

Video aulas


Concentre-se em áreas específicas do inglês empresarial utilizando nossas vídeoaulas
 
Faça uma aula de vídeo