there are six rules (for)a safe and healthy life 为什么用for 不用in?

there are six rules (for)a safe and healthy life 为什么用for 不用in? There are some rules she can't____. There are six books in the schoolbag.(six提问） there are six books in my schoolbag对six提问 Are there six days in a week? there are (six monkeys)in the zoo. home,are,there,home rules,at组成句子 there are so many rules .it is so t＿ there are the rules at my school 改成特殊疑问句 There are many rules of the school 和There are many rules at school of the school 和at school There are six people are sleeping on the bus. 是there is only six lessons还是there are only six lessons 英文翻译：包括我,共有六人._____me,there are six people. There are more than six h___ students in our school. There are six tea cups on that white table翻译 There are (six apples) on the desk括号提问 are,there,six,in,family,people,my,(.)连词成句 there are twenty-six l_____ in zhe english alphabet