My grandmother is to visit tomorrow. If I had earlier, I would have a cake or bought her a gift. Whenever she visits, she always me a gift. I can’t wait to see her!

Use “baked” after “had” because the past perfect is formed with had + the past participle. So the phrase is “If I had baked earlier …” “Bake” is the base form, and “baking” does not fit after “had” here.

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