Can you please check if the following sentences are correct? Thank you.

1) The song "Don't worry be happy" says that we shouldn't worry about what happens to us.
2) In particular, if we have got some troubles, are out of money or can' pay the rent.
3)The singer believes that if we have a bad expression on our face, we will make the others feel unhappy, too.
4) I don't like motocycles. I go rollerblading twice a week.
5) I've got a little dog which I keep in my garden. I sometimes ride my bike with my friends (better: I go cycling with my friends?)
6) My cat undestands everyhting I tell him (or say?)
7) I'm going to take my moped driving license. I'm a first year ('s) student.
8)Alba is important for its confectionery industry "Ferrrero".

#2 has major problems! Primarily, it's not a sentence - it's a fragment. Also, you should delete "got."

#3 - delete "the" in front of "others"

#5 - delte "got" and delete the second instance of "my

#6 - check spelling here

#7 - "first-year" (delete the 's)

To check if the following sentences are correct, it is important to review the grammar and structure of each sentence. Here is a breakdown of each sentence and some suggestions for improvement:

1) The song "Don't worry, be happy" says that we shouldn't worry about what happens to us.
- This sentence is grammatically correct.

2) In particular, if we have got some troubles, are out of money or can't pay the rent.
- The phrase "have got" could be simplified to "have" for clarity. Also, the word "can'" should be "can't".
Revised sentence: In particular, if we have some troubles, are out of money, or can't pay the rent.

3) The singer believes that if we have a bad expression on our face, we will make others feel unhappy, too.
- This sentence is grammatically correct.

4) I don't like motorcycles. I go rollerblading twice a week.
- This sentence is grammatically correct.

5) I've got a little dog which I keep in my garden. I sometimes ride my bike with my friends.
- The phrase "I've got" could be simplified to "I have" for clarity. Additionally, using "go cycling" instead of "ride my bike" would be more accurate.
Revised sentence: I have a little dog that I keep in my garden. I sometimes go cycling with my friends.

6) My cat understands everything I tell him.
- The word "undestands" should be "understands". The phrase "tell him" is more appropriate than "say" in this context.
Revised sentence: My cat understands everything I tell him.

7) I'm going to take my moped driving license. I'm a first-year student.
- The possessive form of "first year" should be "first-year".
Revised sentence: I'm going to take my moped driving license. I'm a first-year student.

8) Alba is important for its confectionery industry, "Ferrero".
- This sentence is grammatically correct.

After reviewing and revising the sentences, they are now correct.