| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which have been [v-ing] | 191 |
|
| 2 | problem which have been [verb] | 14 |
|
| 3 | problem [pron] have been [v-ing] | 12 |
|
| 4 | problem which have [be] [v-ing] | 5 |
|
| 5 | problem which [verb] been [v-ing] | 5 |
|
| 6 | problem [Wh det] have been [v-ing] | 5 |
|
| 7 | problem which have [been] [v-ing] | 5 |
|
| 8 | problem which have been [v-ing] | 5 |
|
| 9 | problem which have be [v-ing] | 5 |
|
