| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is often [vb pp] [subord] | 89 |
|
| 2 | is often [verb] as | 60 |
|
| 3 | is often [verb] when | 10 |
|
| 4 | is often seen [subord] | 9 |
|
| 5 | is often see [subord] | 9 |
|
| 6 | is often [verb] because | 7 |
|
| 7 | is often regard [subord] | 7 |
|
| 8 | is often described [subord] | 7 |
|
| 9 | is often regarded [subord] | 7 |
|
| 10 | is often describe [subord] | 7 |
|
| 11 | is often use [subord] | 5 |
|
| 12 | is often used [subord] | 5 |
|
