fromEnglish Grammar Today
We can useno doubtwhen we think that what we are saying is likely to happen, or when we think it is true. It is similar to ‘I suppose’ or ‘I imagine’:
A:No doubtyou’ll want breakfast before you leave tomorrow.
B:Yes, if that’s okay.
A:No problem.
We can usethere is no doubt that …when we are very certain about our opinion. We use it in formal situations:
He’s never won Wimbledon, butthere’s no doubt thathe is a great tennis player.
Not:He’s never won a Wimbledon title but no doubt he’s a great tennis player.
Without doubtis even more formal. We use it when we are absolutely certain about our opinion:
Paul McCartney iswithout doubtone of the greatest composers of popular music of all time.
Not:Paul McCartney is no doubt one of the greatest…