| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb mod] be [adj] | 1370 |
|
| 2 | which [vb mod] be [adj] | 1248 |
|
| 3 | [pron] [vb mod] be difficult | 600 |
|
| 4 | which [vb mod] be difficult | 44 |
|
| 5 | which [vb mod] be difficult | 44 |
|
| 6 | which [modal v] be difficult | 44 |
|
| 7 | which [vb mod] [be] difficult | 44 |
|
| 8 | which [vb mod] [be] difficult | 44 |
|
