If somebody can help me I appreciate,
If something with this test please tell me, my grammar is not the best
Phil’s suggestion is a good one. I noticed you posted this under American Sign Language (sinais pra a comunidade surda) which is also in your profile. That’s bound to lead to some misunderstandings :-). Actually, I was wondering how you can improve your pronunciation in ASL :-)?
Identify the sounds you have trouble with. Practice saying them out loud, and in sentences. Recording them is a good idea, as is watching your mouth in a mirror or your cellular, while you speak.
For the sounds you have trouble with, try tongue twisters: trabalenguas.
Find an English speaker you admire, and copy what they say.
Finally, don't worry if your pronunciation is not perfect. The important thing is to obtain fluency.