Question forms

A sentence with a change-of-state le 了 can take ma 吗 at the end of the sentence to form a ma 吗 question. Choice-type questions are not usually used in sentences with a change-of-state le 了 except for sentences in which the predicate verb is preceded by an optative, a dispositional verb or a modal verb (such as huì 会, néng 能, kěyǐ 可以, xiǎng 想, xǐhuan 喜欢, etc.) or in yǒu 有 sentences.

1. 
   Shān-lǐ tiānqi lěng le ma? (ma 吗 question)
   山里天气冷了吗？Has the weather become cold in the mountains?


2. 
   Nǐ huì kāi chē le ma? (ma 吗 question)
   你会开车了吗？
   Are you able to drive now?


3. 1. 
      Nǐ huì bú huì kāi chē le? (choice-type question)
      你会不会开车了？
      Are you able to drive now?
   
   
   2. 
      Huì le. Hái bú huì.
      会了。还不会。Yes, I am. Not yet.