| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] is [conj] it [verb] | 755 |
|
| 2 | system is [conj] [pron] [verb] | 23 |
|
| 3 | system be [conj] it [verb] | 21 |
|
| 4 | system [be] [conj] it [verb] | 21 |
|
| 5 | system [is] [conj] it [verb] | 16 |
|
