be sure of

We cannot be sure of Logan Paul’s intentions when he released his clip.

Others suggest Reeves wants reform but also wants to be sure of a full political backing from the neighbours at No 10.

It won't stop with Ukraine, we can be sure of that.

The mood here may have hit fever pitch last night, but a toss-up race shows that Democrats still have a lot of work to do if they are to be sure of winning the White House.

Even now, we need to be sure of her professed commitment to strengthen the legal and economic foundations of working- and middle-class security and comity.