| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] carry out on [noun prp] | 12 |
|
| 2 | [was/were] carried [adv prt] on [noun prp] | 12 |
|
| 3 | was carry [adv prt] on [noun prp] | 10 |
|
