| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [conj] is | 14604 |
|
| 2 | system [conj] [be] | 267 |
|
| 3 | system [conj] be | 267 |
|
| 4 | system [conj] [is] | 140 |
|
