| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adj] [verb] [adj] | 3440 |
|
| 2 | [is] [adj] [to-vb] [adj] | 3319 |
|
| 3 | [be] [adj] to ensure [adj] | 29 |
|
| 4 | [is] [adj] ensure [adj] | 14 |
|
