| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | required to be [verb] | 145 |
|
| 2 | required [prep] be [vb pp] | 145 |
|
| 3 | required [prep] be make | 11 |
|
| 4 | required [prep] be made | 11 |
|
| 5 | required [prep] be give | 9 |
|
| 6 | required [prep] be given | 9 |
|
| 7 | required [prep] be fit | 7 |
|
| 8 | required [prep] be fitted | 7 |
|
| 9 | required [prep] be carry | 6 |
|
| 10 | required [prep] be carried | 6 |
|
| 11 | required [prep] be taken | 5 |
|
| 12 | required [prep] be take | 5 |
|
| 13 | required [prep] be served | 5 |
|
| 14 | required [prep] be serve | 5 |
|
| 15 | required [prep] be done | 5 |
|
| 16 | required [prep] be do | 5 |
|
