| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [verb] [been] a relief | 8 |
|
| 2 | [modal v] [verb] [been] a relief | 8 |
|
| 3 | must [verb] [been] a relief | 6 |
|
| 4 | must [verb] [been] a relief | 6 |
|
