| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb mod] be [adj] | 2501 |
|
| 2 | they [vb mod] be [adj] | 2321 |
|
| 3 | [pron] [vb mod] be difficult | 600 |
|
| 4 | they [vb mod] [be] difficult | 16 |
|
| 5 | they [vb mod] [be] difficult | 16 |
|
| 6 | they [modal v] be difficult | 16 |
|
| 7 | they [vb mod] be difficult | 16 |
|
| 8 | they [vb mod] be difficult | 16 |
|
