| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have prove to [be] | 139 |
|
| 2 | system have [verb] to [be] | 10 |
|
| 3 | system [verb] prove to [be] | 6 |
|
| 4 | system have prove [prep] [be] | 6 |
|
| 5 | system have prove to [be] | 6 |
|
