“肯定”用英语怎么说！

1.to affirm; to approve; to confirm
2.affirmative; positive; definite; sure
3.affirmatively; certainly; surely; definitely; undoubtedly; absolutely

都有肯定的意思

上面的也可以
或是I am sure
certainly

of course / sure 当然
it must be 一定是

Of course

还有：yea、affirmation