7. It’s-it is
8. There’s-there is
9. Can’t-cannot
10. What’s-what is
11. Joe’s-Joe is
12. He’ll-he will
13. shouldn’t-should not
14. they’d-they would
15. Where’s. I’m/ where is; I am
16. bell’s-bell is
In English, it is common to contract the words in a sentence. A contraction consists on two words made shorter by placing an apostrophe where letters have been omitted.
Contractions aren't necessary in written English since sing the full version of a word is always grammatically correct.
However, contractions make a piece of writing seem friendly and accessible.