| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [vb pp] [prep] a [noun] | 997 |
|
| 2 | have [been] [vb pp] [prep] a series | 39 |
|
| 3 | [verb] [been] [vb pp] [prep] a series | 39 |
|
| 4 | has [been] [verb] [prep] a series | 22 |
|
| 5 | has [been] [vb pp] [prep] [art] series | 19 |
|
| 6 | [vb -s] [been] [vb pp] [prep] a series | 19 |
|
| 7 | has [been] [vb pp] [prep] a series | 19 |
|
| 8 | has [been] [vb pp] [prep] [art] series | 19 |
|
| 9 | has [been] [vb pp] [prep] a series | 19 |
|
| 10 | has [be] [vb pp] [prep] a series | 19 |
|
