After I finish my homework.
Fragment (After I finish my homework, I will go to bed.)
Also, is a serious problem in my country.
Fragment (Also, it is a serious problem in my country.)
Marta and Juan play piano but don't play guitar.
Simple Sentence
In addition to English, speaking Spanish fluently.
Fragment (In addition to English, she speaks Spanish fluently.)
Levi gave to his friend.
Fragment (Levi gave a book to his friend.)
Because of my work hours.
Fragment (Because of my work hours, I get home late.)
I went shopping yesterday and bought a new dress.
Simple Sentence
Lee and Vanessa studied hard for the exam.
Simple Sentence
Clean up your room!
Simple Sentence (command)
We back home last summer
Fragment (We went back home last summer.)