| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for when [v-ing] | 30 |
|
| 2 | for when choose | 7 |
|
| 3 | for when choosing | 7 |
|
| 4 | for when buying | 5 |
|
| 5 | for when buy | 5 |
|
