| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [not/n't] be left to | 26 |
|
| 2 | [modal v] not be left to | 25 |
|
| 3 | should [not/n't] be left to | 9 |
|
| 4 | should [not/n't] be left to | 9 |
|
| 5 | can [not/n't] be left to | 7 |
|
| 6 | can [not/n't] be left to | 7 |
|
| 7 | must [not/n't] be left to | 5 |
|
| 8 | must [not/n't] be left to | 5 |
|
