| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] a [adj] [noun] system | 10 |
|
| 2 | it [verb] a [adj] [noun] system | 10 |
|
| 3 | it [verb] a [adj] [noun sg] system | 9 |
|
| 4 | it [vb -s] a [adj] [noun] system | 6 |
|
