'Unless' vs 'As long as': What's the difference? English In A Minute

95,851 views ・ 2019-09-23

BBC Learning English


Please double-click on the English subtitles below to play the video.

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Hi, I'm Georgina from BBC Learning English.
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In today's lesson, we look at the difference between
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'unless' and 'as long as'.
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Unless and 'as long as' can be used to replace 'if'
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in different situations.
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Let's have a look at some example sentences:
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I will go to the party if you come too.
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I will go to the party as long as you come too.
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Both of these sentences have the same meaning.
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Notice that the verb after 'if' and 'as long as' is positive.
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Now look at these sentences:
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If you don't do your homework, you can't watch the film.
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Unless you do your homework, you can't watch the film.
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Both of these sentences have the same meaning.
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But notice that the verb after 'if' is negative
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and the verb after 'unless' is positive.
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Bye!
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