No | Pattern | Freq | Relations |
---|---|---|---|
1 | shown to be [adj] | 235 | |
2 | shown to be [adj] | 227 | |
3 | [verb] to be essential | 31 | |
4 | [vb pp] to be essential | 13 | |
5 | shown to be essential | 5 | |
6 | shown to [be] essential | 5 | |
7 | shown to be essential | 5 | |
8 | shown to [be] essential | 5 | |
9 | show to be essential | 5 | |
10 | shown [prep] be essential | 5 | |
11 | shown [prep] be essential | 5 | |
12 | shown to be essential | 5 |