Completa las frases con la forma correcta del verbo que se encuentra entre paréntesis; haciendo sus formas interrogativas, negativas y afirmaciones
1. She _____ (clean) up the kitchen by the time we arrived.
2. They _____ ( study) a lot the days before, so they were ready for the exam.
3.I ____ (be) at home all day. I had to get out and go for a walk.
4.She ____ (teach) Shakespeare before.
5._____ you _____ to that restaurant before?
6._____ you _____ (eat) breakfast when you left the house?
7.We ____ (not/finish) the document when the computer crashed.
8.She ____ (prepare) dinner before leaving for work that day.
9.I ____ (not/do) all my homework when I went to class.
10._____ you _____ (meet) her before?