No | Pattern | Freq | Relations |
---|---|---|---|
1 | it be difficult [to-vb] these | 17 |
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2 | it [be] difficult [to-vb] these | 17 |
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3 | it [be] difficult [to-vb] these | 17 |
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4 | it [is] difficult [to-vb] these | 14 |
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5 | it is difficult [to-vb] these | 13 |
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