| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [prep] [art] | 35859 |
|
| 2 | [is] [vb pp] [prep] [art] | 30723 |
|
| 3 | [be] required [prep] [art] | 587 |
|
| 4 | [is] require [prep] [art] | 235 |
|
| 5 | [is] required [prep] [art] | 235 |
|
| 6 | [is] required [prep] [art] | 235 |
|
