Unit # 1. 5 sentences about what you had done before coming to class today, using the past perfect.

 Number 1

Before coming to class, I had checked the class schedule to avoid being late.

Number two 

Before heading to the classroom, I had already done a study group with Mayerlis.

Number three

By the time left the house, I realized that I had left the keys inside the house.

Number four

Before coming to class, I had already washed my hair at home

number five

Before going to class, I had finished the research work