| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have be | 21604 |
|
| 2 | have be [v-ing] | 19925 |
|
| 3 | [modal v] be [v-ing] | 15842 |
|
| 4 | [modal v] have [v-ing] | 10 |
|
