| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun sg] | 465207 |
|
| 2 | been a [noun sg] | 6969 |
|
| 3 | been [prep] [noun sg] | 2985 |
|
| 4 | been [prep] a | 1221 |
|
