| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when i [be] [v-ing] | 699 |
|
| 2 | i [vb past] [be] [v-ing] | 566 |
|
| 3 | when i [vb past] [v-ing] | 83 |
|
| 4 | when i [vb past] [be] | 31 |
|
