助动词
中文翻译：不是
同义词：
["ain't", "isn't例句：1. She didn't come to the party last night.（她昨晚没有来参加聚会。）"]
例句：
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1. She didn't come to the party last night.
她昨晚没有来参加聚会。
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2. I wasn't sure about the directions.
我对路线不确定。
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3.He wasn't feeling well this morning.
他今天早上感觉不太好。