| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [vb pp] [prep] a | 5754 |
|
| 2 | [been] [vb pp] [prep] [noun pl] | 3061 |
|
| 3 | [vb pp] [prep] a [noun pl] | 449 |
|
| 4 | [been] [prep] a [noun pl] | 15 |
|
