There are a couple ways: I can see, Hank, that you are studying hard. (Or) Hank, I can see that you are studying hard.
There are several ways you can write this and still be grammatically correct. *Hank, I see you are studying very hard. **I can see, Hank, that you are studying quite hard. **You are studying very diligently, Hank.
The proper way to write the sentence is "I can see, Hank, that you are studying hard." This involves using commas correctly to separate the name "Hank." Both versions of the sentence are grammatically acceptable depending on emphasis.
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