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 [prep] [be] essential | 5 | |
8 | shown to [be] essential | 5 | |
9 | shown [prep] [be] essential | 5 | |
10 | show to [be] essential | 5 |