No | Pattern | Freq | Relations |
---|---|---|---|
1 | is difficult [to-vb] [adj] [noun] | 128 |
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2 | is [adj] [to-vb] such [noun] | 52 |
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3 | be difficult [to-vb] such [noun] | 9 |
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4 | [be] difficult [to-vb] such [noun] | 9 |
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5 | [is] difficult [to-vb] such [noun] | 8 |
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6 | is difficult [verb] such [noun] | 8 |
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