| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] system [verb] | 198 |
|
| 2 | [adj] system [verb] be | 125 |
|
| 3 | a [adj] system be | 115 |
|
| 4 | a [adj] [verb] be | 30 |
|
| 5 | a system [verb] be | 9 |
|
