| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] a [noun sg] | 7599 |
|
| 2 | should be [vb pp] [prep] [noun sg] | 1330 |
|
| 3 | should be [vb pp] [prep] a | 976 |
|
| 4 | should be [prep] a [noun sg] | 73 |
|
| 5 | should be [vb pp] a [noun sg] | 64 |
|
