| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it a [noun] | 2451 |
|
| 2 | it a [noun sg] | 2399 |
|
| 3 | [pron] a problem | 75 |
|
| 4 | it [art] problem | 25 |
|
| 5 | it [art] problem | 25 |
|
| 6 | it a problem | 20 |
|
| 7 | it a problem | 20 |
|
