No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] been operating for [adv] | 6 |
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2 | [verb] been operating for [adv] | 6 |
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3 | have been operating for [adv] | 6 |
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4 | has been operating for [adv] | 5 |
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5 | [vb -s] been operating for [adv] | 5 |
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