Questions how is the most important thing in speaking English. As most of the time your conversation begins with a question if it is necessary to improve it. Here are some tips to learn the techniques of interrogation:

Tip 1: Keep the rules to the question in your mind.

Rule 1:
W / H family helping + verb + subject + verb + object (if applicable) +?
For example: When did he take food?. In this sentence when l / h family, contributes verb, it is subjected, is to take the word, the food is subject to and after the question mark.

Rule 2:
In case you need to start Whose your question, how much, or how, this rule applies only:
W / H + + designed to help families verb + subject + verb +?

For example:
Q. whose car he was driving?
Q. How much water does it meet?

Rule 3:
If there is no subject and the sentence is affirmative, you do not have to use past tense verbs help undefined undefined and present.

For example:
Q. Who wrote the letter with a pen?
Q. whose brother went to London?

Tip 2: Do not keep the rules of the time in mind. When you have to ask questions related to these things, ask questions only present as:
Q. Why do you always late?
Q. Where has it been that long?

In the past:
Q. Where did it go yesterday?
Q. When were you studied last night?

In the future:
Q. Where will he play?
Q. which car will you buy?

Tip 3: Practice is the most important thing in speaking English. The more you practice, the more you would.