1
They's legends (incorrect= the right form is "They're")
2
They's = African-American vernacular English contraction of they is.
3
Adding a prefix: in + complete= incomplete
4
Phonetics, syntax and pragmatics.
5
pen= Have you got any pen?
6
French, German and Spanish.
7
policial and medical slangs
8
pen= a writing tool
9
Tom (subject) pushed (verb) the (indefinite article) boat (object).