| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] [vb pp] [conj] [art] | 1040 |
|
| 2 | problem [be] [vb pp] [conj] [art] | 20 |
|
| 3 | problem [is] [verb] [conj] [art] | 14 |
|
| 4 | problem [is] [vb pp] [conj] [art] | 11 |
|
