| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been undergo [adj] [noun sg] | 8 |
|
| 2 | have been undergo [adj] [noun sg] | 8 |
|
| 3 | [vb -s] been undergo [adj] [noun sg] | 6 |
|
| 4 | has been undergo [adj] [noun sg] | 6 |
|
| 5 | been undergo a [adj] [noun sg] | 7 |
|
| 6 | been undergo [art] [adj] [noun sg] | 7 |
|
| 7 | been undergo a [adj] [noun sg] | 7 |
|
| 8 | been undergo [art] [adj] [noun sg] | 7 |
|
