| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] be [prep] | 37 |
|
| 2 | [is] [vb pp] is [prep] | 35 |
|
| 3 | [is] [vb pp] be in | 12 |
|
| 4 | [is] [vb pp] be for | 9 |
|
| 5 | [is] needed be [prep] | 6 |
|
| 6 | [is] [vb pp] be at | 5 |
|
