1. I have not traveled much yet; however, I will have visited the Grand Canyon and San Francisco by the time I leave the United States.
2. By the time you finish studying the verb tense tutorial, you will have mastered all twelve tenses including their passive forms.
3. Drive faster! If you don't hurry up, she will have had the baby by the time we get to the hospital.
4. I came to England six months ago. I started my economics course three months ago. When I return to Australia, I will have been studying for nine months and I will have been in England for exactly one year.