彼はきっと成功するだろう。
He will surely succeed.
He will certainly succeed.
He is sure to succeed.
I am sure that he will succeed.
He is sure of success.
He is sure that he will succeed.
He is sure to succeed.
I’m sure that he will succeed.
彼はきっと東京にいるでしょう。
He will undoubtedly be in Tokyo.
もし彼女が7時に出たのなら、今頃きっとあちらに着いているはずだ。
If she left at seven, she ought to be there by now.
明日きっとお訪ねします。
I will call on you tomorrow without fail.