| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] an | 39997 |
|
| 2 | be an | 39994 |
|
| 3 | been [art] | 22200 |
|
| 4 | been [art] | 22200 |
|
| 5 | been a | 14628 |
|
| 6 | [been] an | 1985 |
|
