LoginUnless vs. If
Unless and if are used to introduce conditions but they are not interchangeable. In this lesson, we will learn more about them.
What Is Their Main Difference?
Unless
'Unless' is used in conditional sentences. These sentences set out conditions. When use 'unless,' we show that something will or will not happen except if another action occurs. Note that we do not use 'unless' for impossible conditions.
He won't come
I will be there on time
If
'If' is used to introduce conditions. It is used in if. It shows that X happens and as a result Y will happen. In other words, Y happens because of X.
I would help
He should have been here
Are They Interchangeable?
No. They are not interchangeable; however, we can use them to express the same meaning.
We will go on a picnic
We won't go on a picnic
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