| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] system when it | 6 |
|
| 2 | [noun] system when it | 6 |
|
| 3 | [noun sg] system when it | 6 |
|
| 4 | [art] system when it | 6 |
|
| 5 | system when it be | 7 |
|
| 6 | system when it is | 7 |
|
| 7 | system when it [be] | 7 |
|
| 8 | system when it [verb] | 7 |
|
| 9 | system when it [is] | 7 |
|
| 10 | system when it [vb -s] | 5 |
|
