| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] refer to | 257 |
|
| 2 | [noun pl] [be] refer to | 208 |
|
| 3 | [noun pl] [modal v] [be] refer | 68 |
|
| 4 | [noun pl] [modal v] refer to | 40 |
|
| 5 | [noun pl] [modal v] [be] to | 36 |
|
