| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have become a [noun] | 774 |
|
| 2 | have [verb] a source | 12 |
|
| 3 | have [vb pp] a source | 11 |
|
| 4 | have become [art] source | 7 |
|
| 5 | [verb] become a source | 7 |
|
| 6 | have become a source | 7 |
|
| 7 | have become a source | 7 |
|
| 8 | have become [art] source | 7 |
|
