| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used for [det] [noun] | 252 |
|
| 2 | [am/are] used for [noun] | 80 |
|
| 3 | [am/are] for [det] [noun] | 30 |
|
| 4 | [am/are] used for [det] | 19 |
|
