| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [conj] [adj] | 1099 |
|
| 2 | is often [verb] [conj] | 283 |
|
| 3 | often [verb] [conj] [adj] | 139 |
|
| 4 | is often [verb] [adj] | 17 |
|
