







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 | |
|---|---|
| I can't promise, but we can try, at least. | Ich kann es nicht versprechen, aber wir können es zumindest versuchen. |
| Or maybe I can have some drinks with friends from work. | Oder vielleicht mit Freunden aus der Arbeit etwas trinken gehen. |
| Maybe we should start looking for houses in the suburbs first. | Wir sollten wahrscheinlich anfangen uns zuerst Häuser in den Vororten anzusehen. |
| Then we can talk, maybe! | Dann können wir vielleicht darüber reden! |
| I can understand that. | Das kann ich verstehen. |
| Yeah, maybe next time you can put that as a note on the ad. | Ja, nächstest Mal kannst du das in der Anzeige erwähnen. |
| That's nice, can we add some beer to it for me, also? | Das ist super. Können wir für mich auch etwas Bier dazugeben? |
| I said it was a mistake, I was terribly sorry, what else could I say? | Ich habe ihr gesagt, dass es ein Fehler war und dass es mir sehr Leid tut, was hätte ich sonst sagen können? |
| Yes, normally, that's what they should do. | Ja, das hätten sie normalerweise tun sollen. |
| I'm already scared, can you please stop with that evil thing? | Ich habe bereits Angst. Kannst du bitte aufhören die Sache mit dem Bösen zu erwähnen? |
| She could leave the front door open and let them out! | Sie könnte die Haustüre offen lassen und sie herauslassen! |
| I'm just concerned about whether we can afford to rent a house! | Ich mache mir nur Sorgen, ob wir es uns leisten können ein Haus zu mieten! |
| Why do you have to finish everything today? | Warum musst du heute mit allem fertig werden? |
| You must work very hard. | Du musst echt viel arbeiten. |
| We can do it whenever you like. | Wann immer du möchtest. |
| I'm sorry guys, I must have miscalculated the percentages! | Es tut mir Leid Leute. Ich muss mich mit den Prozenten verrechnet haben! |
| Of course, we can leave whenever you want. | Natürlich, wir können gehen wann immer du möchtest. |
| I wish I could, but I can't, I have to get ready for work. | Ich wünschte ich könnte, aber ich muss mich für die Arbeit fertigmachen. |
| They should be back any time. | Sie sollten jeden Moment zurück sein. |
| No, all the cutlery should be in the top drawer! | Nein, das ganze Besteck sollte in der oberesten Schublade sein! |