| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [conj] a | 518 |
|
| 2 | is hard [verb] [conj] | 132 |
|
| 3 | is hard [verb] a | 32 |
|
| 4 | hard [verb] [conj] a | 24 |
|
