| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] could be do [prep] a | 5 |
|
| 2 | [noun] could be do [prep] a | 5 |
|
| 3 | could be do [prep] [verb] a | 6 |
|
| 4 | could be do [prep] [v-ing] a | 6 |
|
| 5 | could be do [prep] a [adj] | 7 |
|
| 6 | could be do [prep] a [adj] | 7 |
|
| 7 | could be do [prep] a [noun] | 6 |
|
| 8 | could be do [prep] a [noun sg] | 6 |
|
