| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can [adv] be [vb pp] when | 56 |
|
| 2 | can only [be] [vb pp] when | 30 |
|
| 3 | can also [be] [vb pp] when | 10 |
|
| 4 | can [adv] [be] used when | 7 |
|
