| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system that [vb mod] [verb] [noun prp] | 6 |
|
| 2 | system that [modal v] [verb] [noun prp] | 6 |
|
| 3 | system that [modal v] [vb infin] [noun prp] | 6 |
|
| 4 | system that [modal v] [verb] [noun prp] | 5 |
|
