| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] a | 15851 |
|
| 2 | [prep] [be] a | 14045 |
|
| 3 | [modal v] [prep] [be] | 5048 |
|
| 4 | [modal v] [prep] a | 289 |
|
