| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem [verb] to be | 57 |
|
| 2 | problem [vb -s] to be | 41 |
|
| 3 | problem seem to be | 22 |
|
| 4 | problem seems to be | 18 |
|
| 5 | problem [vb past] to be | 14 |
|
| 6 | problem have to be | 11 |
|
| 7 | problem has to be | 7 |
|
| 8 | problem appear to be | 7 |
|
| 9 | problem need to be | 6 |
|
| 10 | problem appears to be | 6 |
|
| 11 | problem tend to be | 5 |
|
