| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | are [vb pp] [prep] a | 4213 |
|
| 2 | are often [vb pp] [prep] | 773 |
|
| 3 | often [vb pp] [prep] a | 457 |
|
| 4 | are often [prep] a | 13 |
|
| 5 | are often [vb pp] a | 6 |
|
