1.They take a book everyday. They don't take a book. Do they take a book?2.They are taking book now. They aren't taking book now. Are they taking book now?3.They have already taken a book. They haven't taken a book. Have they taken a book yet?4.They have been taking a book for 5 years. They haven't been taking a book since 1999. Have they been taking a book?5.They took a book yesterday. They didn't take a book yesterday. Did they take a book yesterday?6.They were taking a book, when I came home. They weren't taking a book from 5 till 7. Were they taking a book at that time?7.They had taken a book by that time. They hadn't taken a book by 7 o'clock yesterday. Had they taken a book by the party?8.I think they'll take a book tomorrow. They feel bad today they won't take a book tomorrow. Will they take a book tomorrow?