| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system be a [adj] | 58 |
|
| 2 | system [be] a [adj] | 57 |
|
| 3 | system [is] a [adj] | 43 |
|
| 4 | system is a [adj] | 42 |
|
| 5 | system was a [adj] | 14 |
|
| 6 | system [was/were] a [adj] | 14 |
|
