| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] be [adj] for | 148 |
|
| 2 | be [vb pp] [prep] be essential [prep] | 8 |
|
| 3 | be [vb pp] [prep] be essential [prep] | 8 |
|
| 4 | [be] [vb pp] [prep] be essential for | 5 |
|
| 5 | be [vb pp] [prep] be essential for | 5 |
|
| 6 | be [vb pp] [prep] [be] essential for | 5 |
|
| 7 | be [vb pp] [prep] be essential for | 5 |
|
| 8 | be [verb] [prep] be essential for | 5 |
|
