No | Pattern | Freq | Relations |
---|---|---|---|
1 | could [vb infin] [pron] have happened | 10 | |
2 | could [vb infin] [pron] had happen | 9 | |
3 | could [vb infin] what have happen | 8 | |
4 | could [vb infin] what have happen | 8 | |
5 | could [vb infin] [Wh det] have happen | 8 | |
6 | could see [pron] have happen | 5 |