| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be a | 15848 |
|
| 2 | [modal v] be [prep] | 14380 |
|
| 3 | be [prep] a | 2295 |
|
| 4 | [modal v] [prep] a | 289 |
|
