| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [be] a [adj] | 304 |
|
| 2 | used [prep] [be] a [adj] | 116 |
|
| 3 | [noun] used [prep] [be] a | 66 |
|
| 4 | [noun] used [prep] [be] [adj] | 50 |
|
