| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] become a [noun] | 459 |
|
| 2 | [vb -s] [verb] a problem | 40 |
|
| 3 | [verb] become a problem | 11 |
|
| 4 | [vb -s] become [art] problem | 7 |
|
