If you completed your F-1 visa status in May 2017, you are considered as a US resident in 2019. Then the answer is Yes, you can claim standard deduction on your 2019 taxes if you don't have enough to itemize.
If you completed your F-1 visa status on May 17, 2019, and if you have not stayed within the US for more than five years, then you would be dual status. Please see the answer from KanreJ from above.
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