| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] a [noun] | 19886 |
|
| 2 | but it [be] a | 1649 |
|
| 3 | but it [be] [noun] | 510 |
|
| 4 | but [be] a [noun] | 98 |
|
