| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun sg] | 407844 |
|
| 2 | [modal v] [prep] [noun sg] | 2102 |
|
| 3 | [modal v] a [noun sg] | 733 |
|
| 4 | [modal v] [prep] a | 289 |
|
