| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system that [vb mod] | 115 |
|
| 2 | system that can | 52 |
|
| 3 | system that will | 40 |
|
| 4 | systems that [vb mod] | 39 |
|
| 5 | system that would | 32 |
|
| 6 | system that could | 12 |
|
