| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [conj] [det] [noun] | 344 |
|
| 2 | is often [vb pp] [conj] [noun] | 55 |
|
| 3 | is often [vb pp] [conj] [det] | 16 |
|
| 4 | often [vb pp] [conj] [det] [noun] | 13 |
|
