| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [modal v] not be seen | 24 |
|
| 2 | they [vb mod] not be seen | 24 |
|
| 3 | they [modal v] not be seen | 23 |
|
| 4 | they [modal v] not be seen | 18 |
|
| 5 | they can not be seen | 12 |
|
| 6 | they can not be seen | 11 |
|
| 7 | they [modal v] n't be seen | 6 |
|
| 8 | they could not be seen | 5 |
|
| 9 | they could not be seen | 5 |
|
