| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not found out | 19 |
|
| 2 | have n't found [adv prt] | 15 |
|
| 3 | have not found [adv prt] | 11 |
|
| 4 | had not found [adv prt] | 7 |
|
