| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] difficult [to-vb] that | 132 |
|
| 2 | it [be] difficult [verb] that | 132 |
|
| 3 | it [be] [adj] to ensure that | 65 |
|
| 4 | it [be] [adj] to ensure that | 64 |
|
| 5 | [pers pn] [be] difficult to ensure that | 5 |
|
| 6 | it [be] difficult ensure that | 5 |
|
| 7 | it [be] difficult to ensure that | 5 |
|
| 8 | it [be] difficult to ensure [conj] | 5 |
|
| 9 | [pron] [be] difficult to ensure that | 5 |
|
| 10 | it [be] difficult to ensure that | 5 |
|
| 11 | it [be] difficult to ensure [that] | 5 |
|
| 12 | it [be] difficult to ensure that | 5 |
|
