| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [conj] [noun] | 1072 |
|
| 2 | is often [vb pp] [conj] | 280 |
|
| 3 | often [vb pp] [conj] [noun] | 111 |
|
| 4 | is often [vb pp] [noun] | 18 |
|
