My father and I have been discussing whether it is possible to concatenate the semi-modal verb "be going to" with modal verbs "must" or "cannot". In our opinion, which we both agreed on, this combination is likely possible:
- She must be going to tell him the truth. - meaning "There is a high probabily that she is going to tell him the truth"
- He can't be going to skip classes today. - meaning "I don't believe that he is going to skip classes today"
What do you native speakers think of this?