| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not be underestimated | 69 |
|
| 2 | [modal v] not be underestimated | 69 |
|
| 3 | should not be underestimated | 52 |
|
| 4 | should not be underestimated | 52 |
|
| 5 | can not be underestimated | 13 |
|
| 6 | can not be underestimated | 13 |
|
| 7 | not be underestimated [conj] | 7 |
|
