| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be very [adj] [to-vb] [conj] [art] | 17 |
|
| 2 | be [adv] difficult [to-vb] [conj] [art] | 12 |
|
| 3 | [be] very difficult [to-vb] [conj] [art] | 12 |
|
| 4 | be very difficult [to-vb] [conj] [art] | 12 |
|
| 5 | be very difficult [verb] [conj] [art] | 8 |
|
| 6 | [be] very difficult [to-vb] [conj] [art] | 8 |
|
