| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is often [adj] [to-vb] | 240 |
|
| 2 | is often difficult [verb] | 80 |
|
| 3 | is often possible [verb] | 40 |
|
| 4 | is often necessary [verb] | 25 |
|
| 5 | is often hard [verb] | 18 |
|
| 6 | is often useful [verb] | 9 |
|
| 7 | is often impossible [verb] | 9 |
|
| 8 | is often [adj] to use | 7 |
|
| 9 | is often [adj] to determine | 7 |
|
| 10 | is often [adj] determine | 7 |
|
| 11 | is often [adj] use | 7 |
|
| 12 | is often [adj] see | 6 |
|
| 13 | is often [adj] make | 6 |
|
| 14 | is often [adj] to tell | 6 |
|
| 15 | is often [adj] find | 6 |
|
| 16 | is often [adj] to find | 6 |
|
| 17 | is often [adj] to make | 6 |
|
| 18 | is often [adj] tell | 6 |
|
| 19 | is often able [verb] | 6 |
|
| 20 | is often [adj] to see | 6 |
|
| 21 | is often [adj] get | 5 |
|
| 22 | is often preferable [verb] | 5 |
|
| 23 | is often helpful [verb] | 5 |
|
| 24 | is often [adj] distinguish | 5 |
|
| 25 | is often [adj] to get | 5 |
|
| 26 | is often [adj] to distinguish | 5 |
|
| 27 | is often sufficient [verb] | 5 |
|
| 28 | is often [adj] to identify | 5 |
|
| 29 | is often [adj] identify | 5 |
|
