| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the system [vb -s] a | 36 |
|
| 2 | the system [vb past] a | 10 |
|
| 3 | the system has a | 7 |
|
| 4 | the system have a | 7 |
|
| 5 | the system [to-vb] a | 6 |
|
| 6 | the system use a | 6 |
|
