| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] [be] [adj] | 1582 |
|
| 2 | [Wh det] [vb mod] [be] [adj] | 1371 |
|
| 3 | [pron] [vb mod] [be] helpful | 314 |
|
| 4 | [Wh det] [vb mod] [be] helpful | 24 |
|
| 5 | [Wh det] [modal v] [be] helpful | 24 |
|
