| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] become a [noun sg] | 8 |
|
| 2 | should [vb infin] become a [noun] | 8 |
|
| 3 | should [verb] become a [noun] | 5 |
|
| 4 | should have become a [noun] | 5 |
|
