How to ask open-ended questions?

Unlike simple yes-or-no questions, open-ended questions invite the respondent to talk — and enable you to get much more information. These are the types of questions to use when you want to find out a person’s opinion or gather some facts during the course of a negotiation. The more you get the other person to talk, the more information you learn. Yes-or-no questions limit choices and force a decision. These types of questions are called closed questions.
Here is a simple closed question requiring a yes-or-no answer:

“Do you like this car?”

An open-ended question, on the other hand, encourages the person to start talking:

“What do you like best about this car?”

Try some classic open-ended questions when you need to get information.
These questions invite the other party to open up and tell all:

“What happened next?’
“So how did that make you feel?”
“Tell me about that.”

Notice in the last example that you can ask a question in the declarative format (as a request rather than as a traditional question). That technique can be very useful if you’re dealing with a reluctant participant. People who won’t answer questions will sometimes respond to a direct order. Open-ended questions aren’t the only types of questions you can use to get people to talk. Here are some other types of questions to help get responses you need:

• Fact-finding questions: These questions are aimed at getting information on a particular subject. “Can you tell me the story about how you decided to bring this product to the market?”
• Follow-up questions: These questions are used to get more information or to elicit an opinion. “So after you do that, what would happen next?”
• Feedback questions: These questions are aimed at finding the difference that makes the difference. “May I say that back to you so I understand the difference between what you are proposing and what I was offering to do?”