| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | question must [be] answered | 12 |
|
| 2 | question must be answer | 12 |
|
| 3 | question must [be] answer | 12 |
|
| 4 | question must be answer | 12 |
|
| 5 | questions must [be] answer | 11 |
|
