Question

That’s why+结果 （造一句。） 2. If 条件句。If +一般现在时，主句用will.(造一句。)

3. 反已疑问句。前肯后否定和前否后肯定。（各造一句。）

Answer 1

That's why I was late this morning. 那就是我今天早上迟到的原因
If you tell me the truth ,I will try my best to help you. 如果你告诉我真相，我就尽最大努力帮你。
You are a student, aren't you? 你是个学生，不是么？
Yes,I am. 是的，我是。 No,I'm not.不 我不是
You won't go there tomorrow, will you?你明天不会去的，是么？
Yes，I will. 不，我会 No,I won't.是的，我不会

Answer 2

That's why I din't tell the truth.
If it is rainny tomorrow,I will stay at home.
He is a student,isn't he? Tom can't swim, can he?