| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [be] useful [prep] [adj] | 65 |
|
| 2 | [that] [vb mod] [be] [prep] [adj] | 27 |
|
| 3 | [that] [vb mod] [be] useful [prep] | 25 |
|
