| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] they have often [vb pp] | 10 |
|
| 2 | [noun] they have often [vb pp] | 7 |
|
| 3 | [subord] they have often [vb pp] | 5 |
|
| 4 | they have often been [vb pp] | 10 |
|
| 5 | they have often be [vb pp] | 10 |
|
| 6 | they have often [been] [vb pp] | 10 |
|
| 7 | they have often [be] [vb pp] | 10 |
|
| 8 | they have often [vb pp] [prep] | 9 |
|
| 9 | they have often [vb pp] [prep] | 9 |
|
| 10 | they have often [vb pp] [noun] | 5 |
|
