| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [vb past] be | 1850 |
|
| 2 | [adj] system be | 1153 |
|
| 3 | [adj] system [vb past] | 298 |
|
| 4 | system [vb past] be | 65 |
|
