| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | prove [prep] [be] [adv] effective | 5 |
|
| 2 | prove [prep] [be] [adv] effective | 5 |
|
| 3 | prove [prep] [be] effective [prep] | 5 |
|
| 4 | prove [prep] [be] effective [prep] | 5 |
|
