| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have take [noun sg] | 9 |
|
| 2 | could [adv] have taken [noun] | 9 |
|
| 3 | could [adv] have take place | 8 |
|
| 4 | could [adv] have take place | 8 |
|
| 5 | could not have take [noun] | 6 |
|
| 6 | could [not/n't] have take [noun] | 6 |
|
| 7 | could not have take [noun] | 6 |
|
