疑問副詞 why、where、how、when 等，會放在句首。這些問句的回答可以是完整的句子，也可以只用介詞片語回答。在疑問副詞形成的問句上，必須將主詞和動詞的位置互調，也就是說動詞會先出現。
舉例
- Why are you so late? There was a lot of traffic.
- Where is my passport? In the drawer.
- How are you? I'm fine.
- When does the train arrive? At 11:15.
how 的使用
用 how 形成問句的方法有四種；而單獨用 how 則是意指「以何種方式」。
舉例
- How did you make this sauce?
- How do you start the car?
- How can I get to your house?
how 可以和形容詞連用來詢問某個特性的程度。
舉例
- How tall are you?
- How old is your house?
- How angry is mother?
how 可以和 much 或 many 連用來詢問數量。much 後面接的是不可數名詞，而 many 接的是可數名詞。
舉例
- How many people are coming to the party?
- How much flour do I need?
- How much are these tomatoes?
how 可以和其他副詞連用來詢問某個動作的頻率或程度。
舉例
- How quickly can you read this?
- How often do you go to London?
- How loudly does your brother scream?