No | Pattern | Freq | Relations |
---|---|---|---|
1 | it be difficult [verb] [adv] these | 5 |
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2 | it be difficult [to-vb] [adv] these | 5 |
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3 | it be difficult [verb] [adv] these | 5 |
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4 | it is difficult [verb] [adv] these | 5 |
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