Hello! That's very good Hengchun! IfMatt and Elena don't arrive at the party before 8 o'clock, they won't get anything to eat. Here's Matt: Matt: Unless we're there at 8 o'clock we won't get anything to eat! Unless is followed by a subject and verb, like this: Matt: Unless we are there at 8 o'clock… Unless means only if or except if. The second part of the sentence gives the possible result.Matt and Elena will get something to eat only if they arrive before 8. Listen again: Matt: Unless we're there at 8 o'clock we won't get anything to eat! Here's another example: Matt: We'll go by bus unless Elena wants to take a taxi. They will go by bus except if Elena wants to take a taxi. Note that unless is used with a present tense, even when it has a future meaning. Here's another example: Elena: I'm not going to dance unless you ask me. Elena is only going to dance ifMatt asks her. Be careful with positives and negatives. Listen: Matt I'll go by car unless it's a long way Elena I won't go by car unless it's a long way In the first one,Matt will go by car, except if it's a long way, in which case he'll fly, or take the train or something. In the second one, Elena will go by car only if it's a long way. If it's a short distance, she'll fly or take the train. Listen again: Matt I'll go by car unless it's a long way Elena I won't go by car unless it's a long way To recap, 'unless' with a subject and verb means 'only if' or 'except if' in positive and negative sentences. The other part of the sentence gives the possible result. Ok, that's all from me. Good luck with your grammar challenge! ...
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