| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] are often [prep] a | 7 |
|
| 2 | are often [verb] [prep] a | 60 |
|
| 3 | are often [vb pp] [prep] a | 59 |
|
| 4 | are often [adj] [prep] a | 14 |
|
| 5 | are often [adj] [prep] a | 13 |
|
| 6 | are often [prep] a [adj] | 8 |
|
| 7 | are often [prep] a [adj] | 5 |
|
