| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [adv prt] [prep] [art] | 621 |
|
| 2 | [modal v] be [adv prt] [prep] [art] | 621 |
|
| 3 | must be [adv] [prep] [art] | 38 |
|
| 4 | must be [adv prt] [prep] [art] | 14 |
|
| 5 | must [be] [adv prt] [prep] [art] | 14 |
|
| 6 | must be [adv prt] [prep] [art] | 14 |
|
| 7 | must [be] [adv prt] [prep] [art] | 14 |
|
| 8 | must be [adv prt] [prep] [art] | 14 |
|
