







In English we use should / shouldn't /ought to / oughtn't to give advice. We use should / ought to to say something is a good thing to do and shouldn't / oughtn't to say something is a bad thing to do.
Example sentences :
Note : To ask for advice we can say: What should I do?
In English, "can" is a modal verb and only has a present, past and conditional form. It can also be used with a future meaning.
Example sentences :
Note : Can is not used to talk about specific possibilities.
Example sentences :
In English, could is used to talk about past ability/ permission/ possibility.
Example sentences :
"Be able to" can be used in the present, past, future, present perfect and as a gerund or infinitive.
Example sentences :
Note : be able to in the present and past is more formal than can or could.
In English we use might or may to say something in the future is possible, but not decided.
Example sentences :
To make questions with might we usually use Do you think...?
Example questions :
In English we can also use might in short answers.
Example short answers :
In English we use have to + infinitive to say something is necessary or obligatory. We normally use have to for a general obligation from an outside source, such as work or the law.
Examples sentences :
In English we use don't have to + infinitive to say something is not necessary or obligatory. It means you can if you want to, but it's not necessary.
Example sentences :
To make questions we use do/does.
Example questions :
Form : ( Must + infinitive without to )
In English we use must + infinitive to talk about rules and obligations. We normally use must when the speaker imposes the obligation, such as a teacher to students, or even to yourself.
Form : ( Mustn't + infinitive without to )
In English we use mustn't + infinitive to say something is prohibited.
Example sentences :
Note : You can often use can't or be + not allowed to instead of mustn't.
Example sentences :
Note : Mustn't and don't have to have completely different meanings.
Mustn't Vs Don't Have To
Note : Have to is a normal verb and exists in all tenses whereas must is a modal verb and its only forms are must and mustn't.
You can also use have to and must for strong recommendations.
Example sentences :
In English we use must when we are sure something is true.
Example sentences :
In English we use may or might when we think something is possibly true.
Examples sentences :
In English we use can't when we are sure something is impossible.
Examples sentences :
Note : In this context, the opposite of must is can't, NOT mustn't!
In the past, can't, could, may, might and must for probability change to can't have, could have, may have, might have and must have + past participle (Verb 3).
In the past, should and ought to change to should have and ought to have + past participle (Verb 3).
Note : the form of "must" for obligation and "can" are exceptions.
Must for obligation changes to had to + infinitive
Can changes to could or was able to
| Modal example sentences | |
|---|---|
| Can you make 4 serves so we can give some to Bear, too? | ¿Puedes hacer para 4 raciones y así podemos dar un poco a Bear también? |
| Plus I really have to have a shower. | Además, me hace falta una ducha. |
| Umm, we can raise it just a little bit, like 50%. | Umm, podemos subir el precio un poquito, como 50%. |
| My sixth sense tells me I must clean it. | Mi sexto sentido me dice que debo limpiarlo. |
| You could have brought the book directly! | ¡Podías haber traído el libro directamente! |
| That's nice, can we add some beer to it for me, also? | Eso está bien, ¿podemos añadir un poco de cerveza para mí también? |
| I think we can let him explore the garden. | Creo que podemos dejarlo explorar el jardín. |
| Just a sec, I printed the recipe, I have to find it in my bag. | Espera un segundo, he impreso la receta, tengo que encontrarla en mi bolso. |
| Oh, so I should keep my expectations low for tonight, then! | ¡Oh, debería mantener mis expectativas bajas para esta noche, entonces! |
| Can't we have the meeting without the f*cking IT manager! | ¡No podemos tener la reunión sin el p*to gerente de IT! |
| Could it be anywhere else? | ¿Podría estar en otro lugar? |
| He is a bit of a d*ck, as you might have already realised. | Él es un poco imb*cil, como quizás ya se han dado cuenta. |
| Umm, can I do it after I smoke? | Umm, ¿puedo hacerlo después de fumar? |
| I don't think they can legally be married! | ¡No creo que ellos puedan casarse legalmente! |
| Hello, Camden-City Real Estate, how can I help you? | Hola, Bienes Raíces Camden-City, ¿cómo puedo ayudarle? |
| I see, can you get a month long holiday from work? | Ya veo, ¿puedes tomarte unas vacaciones de un mes en el trabajo? |
| Mike, you are cutting out, I can't hear you! | Mike, se corta, ¡no te oigo! |
| Yeah, maybe next time you can put that as a note on the ad. | Sí, tal vez para la siguiente ocasión puedes poner eso como una nota en el anuncio. |
| Maybe she could even put some poison in their food! | ¡O tal vez podría poner veneno en su comida! |
| I may need to leave him with Mike sometimes. | Puede que tenga que dejarlo con Mike a veces. |