| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it becomes [adj] [verb] | 129 |
|
| 2 | it becomes [adj] [verb] | 115 |
|
| 3 | it [verb] difficult [verb] | 64 |
|
| 4 | it [vb -s] difficult [verb] | 43 |
|
| 5 | it become difficult [verb] | 24 |
|
| 6 | it becomes difficult [verb] | 20 |
|
| 7 | [pron] becomes difficult [verb] | 20 |
|
| 8 | it becomes difficult [verb] | 20 |
|
| 9 | [pers pn] becomes difficult [verb] | 20 |
|
