| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [conj] [pron] [is] not | 847 |
|
| 2 | [to-vb] [conj] [pron] [is] not | 135 |
|
| 3 | to ensure [conj] [pron] [be] not | 29 |
|
| 4 | to ensure [conj] [pron] [is] [adv] | 27 |
|
| 5 | ensure [conj] [pron] [is] not | 14 |
|
| 6 | to ensure [conj] [pron] [is] [not/n't] | 9 |
|
| 7 | to ensure [conj] [pron] [is] not | 9 |
|
