| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] is [conj] | 951 |
|
| 2 | problem is [conj] | 647 |
|
| 3 | problem [adv] [conj] | 184 |
|
| 4 | problem [adv] is | 115 |
|
