| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [verb] these [noun] | 28 |
|
| 2 | is [vb pp] [verb] these [noun pl] | 26 |
|
| 3 | is [vb pp] [to-vb] these [noun] | 26 |
|
| 4 | is required [verb] these [noun] | 6 |
|
