| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb mod] have be [v-ing] | 12 |
|
| 2 | which [modal v] have be [v-ing] | 12 |
|
| 3 | which [modal v] have be [v-ing] | 12 |
|
| 4 | which [modal v] have been [v-ing] | 12 |
|
