| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [conj] [noun] | 1358 |
|
| 2 | is often [verb] [conj] | 283 |
|
| 3 | often [verb] [conj] [noun] | 161 |
|
| 4 | is often [verb] [noun] | 20 |
|
