| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] refer to | 257 |
|
| 2 | they [be] refer to | 53 |
|
| 3 | they [modal v] [be] to | 12 |
|
| 4 | they [modal v] refer to | 11 |
|
| 5 | they [modal v] [be] refer | 8 |
|
