| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [verb] to | 223 |
|
| 2 | who have been [vb pp] to | 200 |
|
| 3 | [pron] have been introduced to | 22 |
|
| 4 | who have been introduced [prep] | 6 |
|
| 5 | [Wh pn] have been introduced to | 6 |
|
| 6 | who [verb] been introduced to | 6 |
|
| 7 | who have [been] introduced to | 6 |
|
| 8 | who have be introduced to | 6 |
|
| 9 | who have been introduce to | 6 |
|
| 10 | who have been introduced to | 6 |
|
| 11 | who have [be] introduced to | 6 |
|
