| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] system be [verb] on the | 8 |
|
| 2 | [noun] system be [vb pp] on the | 8 |
|
| 3 | [noun] system be based on the | 7 |
|
| 4 | [noun] system be base on the | 7 |
|
