Question

Both of them very sad they did not do anything.combine the sentence using though
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Answer 1

Here is the correct answer:

Though both of them didn't do anything, they were very sad.

Explanation

Though is informal. It means the same as although. Meaning of 'though' is 'despite the fact that'.  

Example

Though she did not recognise, I was sure she had met me somewhere.

Answer 2

Though both of them didn't do anything, they were very sad.

Explanation:

Given: Both of them very sad. They did not do anything.

Find: Combine using though.

Solution:

The correct form of the sentence is  "Though both of them didn't do anything, they were very sad."

The sentence implies that both of them felt guilty about a consequences though they did not do anything to cause it.

Though means despite the fact. Despite being innocent, they felt guilty here.