No | Pattern | Freq | Relations |
---|---|---|---|
1 | has been [vb pp] to be [adj] | 88 | |
2 | has [been] shown to be [adj] | 36 | |
3 | has [been] found to be [adj] | 17 | |
4 | has [been] [vb pp] to be effective | 13 | |
5 | has [been] designed to be [adj] | 5 | |
6 | has [been] held to be [adj] | 5 | |
7 | has [been] reported to be [adj] | 5 |