| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has become a [adj] [noun] | 141 |
|
| 2 | [noun] has become a [adj] [noun sg] | 140 |
|
| 3 | [noun] [verb] become a [adj] problem | 9 |
|
| 4 | [noun] has [verb] a [adj] problem | 9 |
|
| 5 | [noun] have become a [adj] problem | 8 |
|
| 6 | [noun] has become [art] [adj] problem | 6 |
|
| 7 | [noun] has become a [adj] problem | 6 |
|
| 8 | [noun] has become [art] [adj] problem | 6 |
|
| 9 | [noun] [vb -s] become a [adj] problem | 5 |
|
| 10 | [noun] has become a [adj] problem | 5 |
|
| 11 | [noun] has become a [adj] problem | 5 |
|
