| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that it have been [adj] | 62 |
|
| 2 | that it have been [adj] | 59 |
|
| 3 | [conj] it have been difficult | 10 |
|
| 4 | that it have [been] difficult | 6 |
|
| 5 | that [pron] have been difficult | 6 |
|
| 6 | that it have been difficult | 6 |
|
| 7 | that it have be difficult | 6 |
|
| 8 | that it [verb] been difficult | 6 |
|
| 9 | that it have [be] difficult | 6 |
|
