Modal verbs used without another verb


Although modal verbs frequently appear in connection with another verb, they can also stand on their own. This is often the case in colloquial phrases:

Ich kann nicht mehr. I can’t go on anymore./ I’ve had enough.
Wir müssen jetzt nach Hause. We have to go home now.
Wir wollen in die Stadt. We want to go/drive into town.
Er kann das sehr gut. He can do this very well.
Das darfst du nicht. You are not allowed to do this.
Können Sie Deutsch? Can you speak German?
Was soll das? What’s this supposed to mean?