







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 | |
|---|---|
| You are going to ask me if I can take Bear out. | Vuoi chiedermi se posso portare fuori Bear. |
| Hm... All the stuff on the left hand side can go. | Hm… Tutta la roba sul lato sinistro può andare. |
| When can I pick up my money?! | Quando posso prendere i miei soldi?! |
| Hmm, nope, I think we can buy everything here. | Hmm, no credo che possiamo comprare tutto qui. |
| Umm, it must be that one with the white fence. | Umm, deve essere quella con lo steccato bianco. |
| But he can't walk on it. | Ma non può camminarci sopra. |
| I can hear well, you don't have to shout at me, dear. | Io ci sento bene, non deve urlarmi contro, caro. |
| You can buy me a beer for giving you my turn. | Puoi pagarmi una birra per averti ceduto il mio turno. |
| The train leaves in a few minutes, we should get on soon. | Il treno parte fra pochi minuti, dovremmo salire presto. |
| Sorry... Beary! Come here, my boy, seems we have to wait a while. | Scusa… Beary! Vieni qui ragazzo, sembra che dovremo aspettare per un po’. |
| I don't want to upset you, but I have to tell you something! | Non voglio farti arrabbiare, ma devo dirti qualcosa! |
| Have you watched A.I.? It's quite violent, too, you might like it. | Hai guardato A.I? È anche piuttosto violento, potrebbe piacerti. |
| By just paying a little bit more you could've rented a house in better condition. | Pagando un pochino di più avresti potuto prendere in affitto una casa in condizioni migliori. |
| I'm sorry, I can't go any lower than 175! | Mi dispiace, non posso scendere sotto 175! |
| It's a very long time, who could stand it? | È molto tempo, chi riuscirebbe a farcela? |
| Can't your housemates look after him? | I tuoi coinquilini non possono prendersi cura di lui? |
| You know what, I can't see any cutlery in the drawer! | Sai che c’è, non vedo posate nel cassetto! |
| Hey, it's my turn, but I think Pogo should go first. | Ehi, è il mio turno, ma credo che Pogo debba andare per primo. |
| Can he walk properly now? | Riesce a camminare bene ora? |
| Of course, you can have whatever you want. | Naturalmente puoi bere tutto quello che vuoi. |