| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [verb] [adv prt] [prep] [art] | 422 |
|
| 2 | could [verb] [adv prt] [prep] [art] | 382 |
|
| 3 | could have [verb] [prep] [art] | 273 |
|
| 4 | could have [verb] [adv prt] [prep] | 100 |
|
| 5 | could have [verb] [adv prt] [art] | 31 |
|
