No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] [be] [v-ing] at a time | 7 |
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2 | [be] [v-ing] at a time [adv] | 9 |
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3 | [be] [v-ing] at a time [Wh adv] | 9 |
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4 | [be] [v-ing] at a time when | 9 |
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5 | [be] [v-ing] at a time when | 9 |
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