3 *Do not enter* this room under any circumstances. 4 *It's really necessary for me to finish* this homework before we go out. 5 *It's a terrible idea to criticise* people when you don't know all the facts. 6 *There's no need for me to get up* early tomorrow. We have a day off school. 7 Her agent says that *it's necessary for her to audition* for the part because it's a great opportunity. 8 *Don't watch* that film! It,will upset you too much.