| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] at the | 960 |
|
| 2 | [is] [vb pp] at the | 640 |
|
| 3 | [is] required [prep] the | 184 |
|
| 4 | [is] required [prep] the | 184 |
|
| 5 | [be] required at the | 12 |
|
| 6 | [is] required at [art] | 10 |
|
| 7 | [is] required at [art] | 10 |
|
| 8 | [is] required at the | 8 |
|
| 9 | [is] required at the | 8 |
|
| 10 | [is] require at the | 8 |
|
