| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [am/are] difficult [to-vb] | 92 |
|
| 2 | [pron] are difficult [verb] | 81 |
|
| 3 | [Wh det] [am/are] difficult [verb] | 44 |
|
| 4 | which [am/are] difficult [verb] | 44 |
|
| 5 | [pers pn] [am/are] difficult [verb] | 44 |
|
| 6 | which [am/are] difficult [verb] | 44 |
|
| 7 | they [am/are] difficult [verb] | 40 |
|
| 8 | they [am/are] difficult [verb] | 39 |
|
| 9 | [pron] 're difficult [verb] | 8 |
|
