| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [was/were] a [noun] | 1575 |
|
| 2 | [det] [was/were] a [noun sg] | 1525 |
|
| 3 | [det] [be] a problem | 113 |
|
| 4 | [det] [was/were] [art] problem | 49 |
|
| 5 | [det] [was/were] [art] problem | 49 |
|
| 6 | [adj] [was/were] a problem | 11 |
|
| 7 | [det] [was/were] a problem | 11 |
|
| 8 | [det] [was/were] a problem | 11 |
|
