| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] arrive at the airport | 6 |
|
| 2 | [subord] [pron] arrive at the airport | 6 |
|
| 3 | when [pron] arrive at the airport | 6 |
|
| 4 | [conj] [pron] arrive at the airport | 6 |
|
