| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before they set [adv prt] [prep] [art] | 6 |
|
| 2 | before they set [adv prt] [prep] [art] | 6 |
|
| 3 | before they set [adv prt] [prep] [art] | 6 |
|
| 4 | before they set off [prep] [art] | 5 |
|
