| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that [pron] [is] difficult | 140 |
|
| 2 | [that] [pers pn] [is] difficult | 140 |
|
| 3 | [that] it [is] difficult | 140 |
|
| 4 | [that] it [is] difficult | 140 |
|
| 5 | [that] [pron] is difficult | 127 |
|
| 6 | [that] [pron] 's difficult | 13 |
|
