Can I use "past tense" and "future tense" in one sentence?
Although Jason went to the America last week for vacation, he will work on time tomorrow.
Thanks so much!
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Yes, absolutely. If you are talking about things that happened at two different times, you certainly can use different tenses to refer to them.
Side note: "America" is a proper noun, and so you shouldn't use an article. For the second part, you probably mean that he will arrive on time. And "vocation" means your job or life's mission; I think you meant he went on "vacation". So the sentence should be, "Although Jason went to America last week for vacation, he will arrive at work on time tomorrow." (Assuming I'm understanding your intent.)