| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have undergone [adj] [noun sg] | 17 |
|
| 2 | who [verb] undergone [adj] [noun sg] | 17 |
|
| 3 | who had undergone [adj] [noun sg] | 10 |
|
| 4 | who [vb past] undergone [adj] [noun sg] | 10 |
|
| 5 | who [verb] undergone [adj] surgery | 7 |
|
| 6 | who [vb base] undergone [adj] [noun sg] | 5 |
|
| 7 | who have undergone [adj] [noun sg] | 5 |
|
