UNIT 4 "Wh" QUESTION WORDS

1. "Wh" question words are use to ask questions.
    “ Wh” 疑问代词用于发问。
   
2. "Who" is used for people.
    “Who” （谁）用于人。
    e.g.

• Who are these children?
• Who came to your house last night?
  

3. "What" is used for things, animals and people.
    “ What” （什么）用于东西、动物和人。
   e.g.

• What colour is your new bicycle?
• What is your favourite food?

4. "Which" is used for both people and thing. It implies selection.
   “Which” （哪一个）用于人和东西。它用来显示选择。
   e.g.

• Which is Susan's house?
• Which dress do you like?

5. "Where" is used for places.
    “Where” （哪里）用于地方。
   e.g.

• Where did she put my books?
• Where do you live?

6. "When" is used for the time, day, month and year.
    “When” （什么时候）用于时间、星期几、月份或年份。
   e.g.

• When is your brother coming home?
• When is your birthday?

7. "Why" is used to ask for a reason.
    “Why” （为什么）用于询问原因。
   e.g.

• Why were you absent yesterday?
• Why did you leave the door open?

8. "How" is used to ask for the way something is done or the condition of someone.
    “How” （怎样）用于询问做某件事的方式或某人的状况。
   e.g.

• How do you make chocolate cookies?
• How are you feeling today?

More exercise here

http://www.myenglishpages.com/site_php_files/grammar-exercise-wh-questions.php
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-47448.php
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-3077.php
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-50162.php