| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is very difficult | 238 |
|
| 2 | [pron] is difficult [prep] | 228 |
|
| 3 | [pron] very difficult [prep] | 59 |
|
| 4 | is very difficult [prep] | 43 |
|
| 5 | [pron] is very [prep] | 5 |
|
