| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [adv] important [prep] | 9 |
|
| 2 | which have be [adv] important [prep] | 9 |
|
| 3 | which have [be] [adv] important [prep] | 9 |
|
| 4 | which have [been] [adv] important [prep] | 9 |
|
| 5 | which have [be] [adv] important [prep] | 9 |
|
