| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used for this [noun] | 93 |
|
| 2 | [am/are] used for [noun] | 80 |
|
| 3 | [am/are] for this [noun] | 8 |
|
| 4 | [am/are] used for this | 7 |
|
