| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | having been [verb] to | 108 |
|
| 2 | have been introduce to | 60 |
|
| 3 | [verb] been introduce to | 60 |
|
| 4 | having been introduce [prep] | 12 |
|
| 5 | having been introduce [prep] | 12 |
|
| 6 | [v-ing] been introduce to | 5 |
|
| 7 | having been introduce to | 5 |
|
| 8 | having [been] introduce to | 5 |
|
| 9 | having [be] introduce to | 5 |
|
| 10 | having be introduce to | 5 |
|
