There will be times when you are having an English conversation where someone will ask

you a question and you will not have the answer.

And in that situation you will need to say, "I do not know."

They might ask a question like:

"Why is the sky blue?"

"I do not know."

"Why did your cat run away?"

"I do not know."

"Why did you eat the last cookie?"

"I do not know."

Now that is the slow, clear, and well pronounced version of that answer.

There are two faster versions and the first is proper English and it is contracting the

words "do" and "not" into "don't".

So you'll have an answer like, "I don't know."

"Why did you get a speeding ticket?"

"I don't know."

"Why did you eat the last cookie?"

"I don't know."

And the next version which is even faster is not really proper written English, but

you will hear it quite often in English conversation.

It looks like this and sounds like this, "I dunno."”

"I dunno."

"Why did you lose your wallet?"

"I dunno."

"Why did you eat the last cookie?"

"I dunno."

"Why didn't you buy tickets to the baseball game?"”

"I dunno."

"Why did you get a speeding ticket?"

"I dunno."

Well that's the response, "I don't know."

"I don't know."

"I dunno."

Bob the Canadian here.

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"I dunno."

"I dunno."

"I dunno."

"Why did you run so fast?"

"I dunno."

"Why did you eat that stick?"

"I dunno."

"Why'd you let the dog out?"

"I dunno."

"Why'd you eat all the cookies?"

"I dunno."

"Why'd you get a speeding ticket?"

"I dunno."

"Why'd you jump outta that tree?"

"I dunno."

"Why'd you steal my candies?"

"I dunno."

"Why'd you….

Why didn't you do you homework?"

"I dunno."