The word(s) "certainly" appears 107 time(s) in 101 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) After (the excitement) of the distress, He sent down calm on a band of you overcome with slumber, while another band was stirred to anxiety by their own feelings, Moved by wrong suspicions of Allah-suspicions due to ignorance. They said: "What affair is this of ours?" Say thou: "Indeed, this affair is wholly Allah's." They hide in their minds what they dare not reveal to thee. They say (to themselves): "If we had had anything to do with this affair, We should not have been in the slaughter here." Say: "Even if you had remained in your homes, those for whom death was decreed would certainly have gone forth to the place of their death"; but (all this was) that Allah might test what is in your breasts and purge what is in your hearts. For Allah knoweth well the secrets of your hearts.

(2) And the Hypocrites also. These were told: "Come, fight in the way of Allah, or (at least) drive (The foe from your city)." They said: "Had we known how to fight, we should certainly have followed you." They were that day nearer to Unbelief than to Faith, saying with their lips what was not in their hearts but Allah hath full knowledge of all they conceal.

(3) Allah hath heard the taunt of those who say: "Truly, Allah is indigent and we are rich!"- We shall certainly record their word and (their act) of slaying the prophets in defiance of right, and We shall say: "Taste ye the penalty of the Scorching Fire!

(4) Ye shall certainly be tried and tested in your possessions and in your personal selves; and ye shall certainly Hear much that will grieve you, from those who received the Book before you and from those who worship many gods. But if ye persevere patiently, and guard against evil,-then that will be a determining factor in all affairs.

(5) And there are, certainly, among the People of the Book, those who believe in Allah, in the revelation to you, and in the revelation to them, bowing in humility to Allah: They will not sell the Signs of Allah for a miserable gain! For them is a reward with their Lord, and Allah is swift in account.

(6) There are certainly among you men who would tarry behind: If a misfortune befalls you, they say: "Allah did favour us in that we were not present among them."

(7) But for the Grace of Allah to thee and his Mercy, a party of them would certainly have plotted to lead thee astray. But (in fact) they will only Lead their own souls astray, and to thee they can do no harm in the least. For Allah hath sent down to thee the Book and wisdom and taught thee what thou Knewest not (before): And great is the Grace of Allah unto thee.

(8) As to those who turn (for friendship) to Allah, His Messenger, and the (fellowship of) believers,- it is the fellowship of Allah that must certainly triumph.

(9) If We had made it an angel, We should have sent him as a man, and We should certainly have caused them confusion in a matter which they have already covered with confusion.

(10) Yea, in their own (eyes) will become manifest what before they concealed. But if they were returned, they would certainly relapse to the things they were forbidden, for they are indeed liars.