| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [vb pp] [prep] a | 1756 |
|
| 2 | has [been] [vb pp] [prep] [n mass] | 135 |
|
| 3 | [been] [vb pp] [prep] a [n mass] | 94 |
|
| 4 | has [vb pp] [prep] a [n mass] | 26 |
|
| 5 | has [been] [vb pp] a [n mass] | 12 |
|
