Отрицательное предложение:

Isn't he going to be at the party tonight?Aren't they supposed to be here by now?Wasn't it supposed to be delivered yesterday?Aren't we supposed to be meeting them for lunch?Hasn't she already confirmed that she will be attending the meeting?

Вопросительное предложение:

Are you going to be at the meeting tomorrow?Is she going to be there on time?Why aren't they going to be at the event?Will it be ready by the deadline?Have you been told where the meeting is going to be held?

Утвердительное предложение:

He is going to be at the party tonight.They are supposed to be here by now.It was supposed to be delivered yesterday.We are meeting them for lunch.She has confirmed that she will be attending the meeting.