| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] to be effective | 35 |
|
| 2 | be to be effective | 35 |
|
| 3 | is to be effective | 23 |
|
| 4 | [is] to be effective | 23 |
|
| 5 | are to be effective | 11 |
|
| 6 | [am/are] to be effective | 11 |
|
