As Long As vs. As Far As

'As long as' and 'as far as' are conjunctions. They may confuse learners but in this lesson, we will discover their uses, similarities, and differences.

What Is Their Main Difference?

The main difference between 'as long as' and 'as far as' is that they express different meanings. 'As long as' expresses a period of time while 'as far as' talks about extent.

Usage

'As long as' and 'as far as' are used in different situations:

As long as

'As long as' is used to mean 'if.' We use it to express conditions.

As long as you study hard, you will pass the exam.

'As long as' is used to express a certain period of time.

You can stay here as long as you want.

We can also use 'as long as' to show requirements.

You can stay here as long as you pay more.

We also use 'as long as' to compare length.

My left leg is as long as my right leg.

As far as

'As far as' refers to the extent of something (knowledge and understanding).

As far as I am aware, there is no issues.

'As far as' can also be used to show distance and degree.

There were flowers as far as I could see.

Parts of Speech

'As long as' and 'as far as' are both conjunctions. They are classified as subordinating conjunctions. They are used to join clauses.

As long as you are good at grammar, you would be alright.

This is the best show as far as I know.

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