| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [conj] | 37774 |
|
| 2 | [prep] [noun] [conj] [modal v] | 4326 |
|
| 3 | [prep] a [noun] [modal v] | 3034 |
|
| 4 | a [noun] [conj] [modal v] | 2862 |
|
