| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [adv] effective [conj] | 43 |
|
| 2 | [vb -s] [prep] be [adv] [conj] | 28 |
|
| 3 | [vb -s] [prep] be [adv] effective | 10 |
|
