If I have money, I . . . . . . . . it tomorrow. A. have purchased B. have purchase C. would purchase D. will purchase

The correct answer is D. will purchase.

The sentence is in the future tense, so the correct verb form should also be in the future tense. Of the four options, only “will purchase” is in the future tense.

“Have purchased” is in the past tense, and “have purchase” is not a correct verb form. “Would purchase” is in the conditional tense, which is used to talk about hypothetical situations. In this sentence, the speaker is not talking about a hypothetical situation, but about something that they will definitely do in the future.

Therefore, the correct answer is D. will purchase.