MODAL infThe phrasal modal is followed by the bare infinitive of another verb. The phrasal modal and the infinitive together form the verb group.
|She||is able to||sit up||in a wheelchair.|
|They||were going to||shoot||something.|
|He||used to||shout||at people.|
All the phrasal modals have this pattern.
be able to had best had better be bound to be going to have got to have to be liable to be meant to ought to would rather would just as soon would sooner be supposed to be sure to be unable to used to would do well to
The deep-sea diving is bound to take me away a good deal, but I know when it's time to settle down, then I'll be looking to come back here.
'Maybe we ought to explore the mountain a little,' said Ginger to Steve.
It was supposed to last for a year and actually lasted eight.
We need good health and circulation of our blood and we would do well not to add salt to our food at all.