| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb past] be | 31719 |
|
| 2 | [noun sg] [vb past] be | 16408 |
|
| 3 | system [verb] be | 312 |
|
| 4 | system [vb past] be | 74 |
|
| 5 | system [vb past] [be] | 65 |
|
