| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [Wh adv] [adj] | 1546 |
|
| 2 | and [Wh adv] [adj] | 634 |
|
| 3 | and [adv] difficult | 190 |
|
| 4 | [coord] [Wh adv] difficult | 22 |
|
| 5 | [conj] [Wh adv] difficult | 22 |
|
| 6 | and [Wh adv] difficult | 16 |
|
| 7 | and [Wh adv] difficult | 16 |
|
