There are a great many prophecies sated in general terms, which a true Christian could legitimately believe have already been fulfilled. There are other prophecies, such as Daniel 11:5-35, which are very specific and have unquestionably already been fulfilled. But there are also a very large number of prophecies that are very specific and have unquestionably not been fulfilled. These are the prophecies which unquestionably refer to a time that is still in our own future.
One of these is Ezekiel 20, where we read:
33 "As I live," says the Lord GOD, "surely with a mighty hand, with an outstretched arm, and with fury poured out, I will rule over you. 34 I will bring you out from the peoples and gather you out of the countries where you are scattered, with a mighty hand, with an outstretched arm, and with fury poured out. 35 And I will bring you into the wilderness of the peoples, and there I will plead My case with you face to face. 36 Just as I pleaded My case with your fathers in the wilderness of the land of Egypt, so I will plead My case with you," says the Lord GOD. 37 "I will make you pass under the rod, and I will bring you into the bond of the covenant; 38 I will purge the rebels from among you, and those who transgress against Me; I will bring them out of the country where they dwell, but they shall not enter the land of Israel. Then you will know that I am the LORD. Ezekiel 20:33-38
Another is Ezekiel 36, where we read:
Eze 36:1 "And you, son of man, prophesy to the mountains of Israel, and say, 'O mountains of Israel, hear the word of the LORD! 2 Thus says the Lord GOD: "Because the enemy has said of you, 'Aha! The ancient heights have become our possession,' " ' 3 therefore prophesy, and say, 'Thus says the Lord GOD: "Because they made you desolate and swallowed you up on every side, so that you became the possession of the rest of the nations, and you are taken up by the lips of talkers and slandered by the people"-- 4 therefore, O mountains of Israel, hear the word of the Lord GOD! Thus says the Lord GOD to the mountains, the hills, the rivers, the valleys, the desolate wastes, and the cities that have been forsaken, which became plunder and mockery to the rest of the nations all around-- 5 therefore thus says the Lord GOD: "Surely I have spoken in My burning jealousy against the rest of the nations and against all Edom, who gave My land to themselves as a possession, with whole-hearted joy and spiteful minds, in order to plunder its open country." ' 6 Therefore prophesy concerning the land of Israel, and say to the mountains, the hills, the rivers, and the valleys, 'Thus says the Lord GOD: "Behold, I have spoken in My jealousy and My fury, because you have borne the shame of the nations." 7 Therefore thus says the Lord GOD: "I have raised My hand in an oath that surely the nations that are around you shall bear their own shame. 8 "But you, O mountains of Israel, you shall shoot forth your branches and yield your fruit to My people Israel, for they are about to come. 9 For indeed I am for you, and I will turn to you, and you shall be tilled and sown. 10 I will multiply men upon you, all the house of Israel, all of it; and the cities shall be inhabited and the ruins rebuilt. 11 I will multiply upon you man and beast; and they shall increase and bear young; I will make you inhabited as in former times, and do better for you than at your beginnings. Then you shall know that I am the LORD. 12 Yes, I will cause men to walk on you, My people Israel; they shall take possession of you, and you shall be their inheritance; no more shall you bereave them of children." Ezekiel 36:1-12
Yet a third is Micah 5, where we read:
5 When the Assyrian comes into our land, And when he treads in our palaces, Then we will raise against him Seven shepherds and eight princely men. 6 They shall waste with the sword the land of Assyria, And the land of Nimrod at its entrances; Thus He shall deliver us from the Assyrian, When he comes into our land And when he treads within our borders. 7 Then the remnant of Jacob Shall be in the midst of many peoples, Like dew from the LORD, Like showers on the grass, That tarry for no man Nor wait for the sons of men. Micah 5:5-7