No | Pattern | Freq | Relations |
---|---|---|---|
1 | [Wh det] could have been [vb pp] | 75 | |
2 | [Wh det] could have be [vb pp] | 75 | |
3 | which could have be [vb pp] | 69 | |
4 | [Wh det] could have be used | 9 | |
5 | what could have be [vb pp] | 6 | |
6 | [Wh det] could have be avoided | 5 |