No | Pattern | Freq | Relations |
---|---|---|---|
1 | [not/n't] [verb] been possible for | 7 | |
2 | [not/n't] have [been] possible for | 7 | |
3 | [not/n't] have [been] possible for | 7 | |
4 | [not/n't] [vb infin] [been] possible for | 7 | |
5 | [not/n't] [verb] [been] possible for | 7 | |
6 | not [verb] [been] possible for | 7 |