| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [subord] [adj] | 549 |
|
| 2 | is often [verb] [subord] | 91 |
|
| 3 | often [verb] [subord] [adj] | 78 |
|
| 4 | is often [verb] [adj] | 17 |
|
