We must find out what we are to do next? (question word + to infinitive)

I last saw Peter when he attended the school meeting.

• I haven’t seen Peter since he attended the school meeting.

Niko’s team had an important match last week.

• There was an important match for Niko’s team last week.

Despite the bad weather, we visited Tay Ho village.

• Although the weather was bad, we visited Tay Ho village.

You should visit Trang An, a natural wonder of the area (worth).

• It’s worth visiting Trang An, a natural wonder of the area.