| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] and it [modal v] be difficult | 12 |
|
| 2 | [noun sg] and it [modal v] be difficult | 9 |
|
| 3 | [adj] and it [modal v] be difficult | 6 |
|
| 4 | [adj] and it [modal v] be difficult | 5 |
|
| 5 | and it [modal v] [adv] be difficult | 5 |
|
| 6 | and it [modal v] be [adv] difficult | 9 |
|
| 7 | and it [modal v] be [adv] difficult | 9 |
|
| 8 | and it [modal v] be very difficult | 6 |
|
| 9 | and it [modal v] be very difficult | 6 |
|
| 10 | and it [modal v] be difficult [verb] | 26 |
|
| 11 | and it [modal v] be difficult [to-vb] | 26 |
|
