No | Pattern | Freq | Relations |
---|---|---|---|
1 | had been [v-ing] [prep] several year | 5 |
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2 | had be [v-ing] for several year | 5 |
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3 | had be [v-ing] [prep] several year | 5 |
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4 | had be [v-ing] [prep] several years | 5 |
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5 | had be [v-ing] for several year | 5 |
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