| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not go ahead | 7 |
|
| 2 | should not go ahead | 5 |
|
| 3 | would not go ahead | 5 |
|
| 4 | may not go ahead | 5 |
|
| 5 | will not go ahead | 5 |
|
