| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has become a [adj] [noun] | 244 |
|
| 2 | [verb] become a [adj] issue | 19 |
|
| 3 | have become a [adj] issue | 17 |
|
| 4 | has [verb] a [adj] issue | 15 |
|
| 5 | has become a [adj] issue | 11 |
|
| 6 | has become [art] [adj] issue | 11 |
|
| 7 | has become [art] [adj] issue | 11 |
|
| 8 | [vb -s] become a [adj] issue | 10 |
|
| 9 | has become a [adj] issue | 10 |
|
