When should I use "I've got to" instead of "I got to" ?

Hello World Hello guys! Today I'm here to talk about Lucy! Lucy is my pet. She's 3 years old. She's the laziest pet in whole world! I Love her too much <3 My advice to you is: Adopt a puppy! give it a home, give it love! Dogs are angels in our lives. They're lovely and funny, and all they do is to make our lives better!

Obrigado, Por favor Hello guys! Today I'm here to tell you about the words 'Obrigado' & 'Por favor '. This words are powerful! Their meaning are, respectively, 'Thank you' & 'please', but in Brazil, when you use them, you'll cause a good impression on people. They reflect your education, how sociable you are. So, that's it! Make sure to include this two words on your vocabulary and you'll see how the does will open to you :)

My fist writing Ok, that's weird haha, well... i'm sorry for my english, i'm here to learn(like you guys). I don't know how this "italki" works but I wish it can help me to lenr and to teach a lot! and I wanna meet new peoplo too! why not? we alllive in the same world, I think that sharing cultures and experiences we learn a lot too! Today is a sad day, I just went so bad on the test yesterday and I'm very angry with myself. Ok, that's all folks, hope you guys have a better day than me.