| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 's [adv] [adv] [adj] [conj] | 287 |
|
| 2 | 's [adv] [adv] [adj] [conj] | 250 |
|
| 3 | be [adv] [adv] difficult [conj] | 81 |
|
| 4 | [be] [adv] [adv] difficult [conj] | 81 |
|
| 5 | [is] [adv] [adv] difficult [conj] | 52 |
|
| 6 | 's [adv] [adv] difficult [conj] | 10 |
|
| 7 | 's [adv] [adv] difficult [conj] | 5 |
|
