| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [noun] [modal v] [be] referred to | 22 |
|
| 2 | [det] [noun sg] [modal v] [be] referred to | 12 |
|
| 3 | [det] [noun pl] [modal v] [be] referred to | 10 |
|
| 4 | [det] [modal v] [be] referred to [prep] | 6 |
|
| 5 | [det] [modal v] [be] referred to [prep] | 6 |
|
