The word(s) "certainly" appears 476 time(s) in 417 verse(s) in Quran in Muhammad Habib Shakir translation.

(151) And We have not sent before you but men from (among) the people of the towns, to whom We sent revelations. Have they not then travelled in the land and seen what was the end of those before them? And certainly the abode of the hereafter is best for those who guard (against evil); do you not then understand?

(152) In their histories there is certainly a lesson for men of understanding. It is not a narrative which could be forged, but a verification of what is before it and a distinct explanation of all things and a guide and a mercy to a people who believe.

(153) And if you would wonder, then wondrous is their saying: What! when we are dust, shall we then certainly be in a new creation? These are they who disbelieve in their Lord, and these have chains on their necks, and they are the inmates of the fire; in it they shall abide.

(154) For those who respond to their Lord is good; and (as for) those who do not respond to Him, had they all that is in the earth and the like thereof with it they would certainly offer it for a ransom. (As for) those, an evil reckoning shall be theirs and their abode is hell, and evil is the resting-place.

(155) And even if there were a Quran with which the mountains were made to pass away, or the earth were travelled over with it, or the dead were made to speak thereby; nay! the commandment is wholly Allah's, Have not yet those who believe known that if Allah please He would certainly guide all the people? And (as for) those who disbelieve, there will not cease to afflict them because of what they do a repelling calamity, or it will alight close by their abodes, until the promise of Allah comes about; surely Allah will not fail in (His) promise.

(156) And apostles before you were certainly mocked at, but I gave respite to those who disbelieved, then I destroyed them; how then was My requital (of evil)?

(157) They shall have chastisement in this world's life, and the chastisement of the hereafter is certainly more grievous, and they shall have no protector against Allah.

(158) And certainly We sent apostles before you and gave them wives and children, and it is not in (the power of) an apostle to bring a sign except by Allah's permission; for every term there is an appointment.

(159) And certainly We sent Musa with Our communications, saying: Bring forth your people from utter darkness into light and remind them of the days of Allah; most surely there are signs in this for every patient, grateful one.

(160) And when your Lord made it known: If you are grateful, I would certainly give to you more, and if you are ungrateful, My chastisement is truly severe.