| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [conj] [art] | 3235 |
|
| 2 | [is] [to-vb] [conj] [art] | 282 |
|
| 3 | [be] to ensure [conj] [art] | 134 |
|
| 4 | [is] ensure [conj] [art] | 89 |
|
