No | Pattern | Freq | Relations |
---|---|---|---|
1 | [is] difficult [to-vb] [adj] [noun] | 139 |
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2 | [is] [adj] [to-vb] such [noun] | 55 |
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3 | [be] difficult [to-vb] such [noun] | 9 |
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4 | [is] difficult [verb] such [noun] | 8 |
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