Can you use the word have at begginning of sentene?

Yes, you can definitely use the word "have" at the beginning of a sentence. It's perfectly grammatically correct, and it's a common way to start sentences in English.

Here are some examples:

* Have you seen the new movie?

* Have you finished your homework?

* Have a nice day!

* Have you ever been to Italy?

However, keep in mind that while grammatically correct, starting a sentence with "have" can sometimes sound a bit formal or unnatural, especially in informal writing or speech.

You might want to consider using a different word or phrase if you're looking for a more casual tone. For example, instead of "Have you seen the new movie?", you could say "Did you see the new movie?".