| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been on strike [prep] | 14 |
|
| 2 | have been on strike for | 6 |
|
| 3 | have been on strike [prep] | 6 |
|
| 4 | had been on strike [prep] | 6 |
|
| 5 | have been on strike since | 5 |
|
