| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for [noun sg] | 145 |
|
| 2 | have [been] selected for [noun sg] | 10 |
|
| 3 | have [been] used for [noun sg] | 9 |
|
| 4 | have [been] developed for [noun sg] | 7 |
|
| 5 | have [been] [vb pp] for use | 5 |
|
