| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [v-ing] [to-vb] a [noun sg] [prep] | 6 |
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| 2 | when [v-ing] [to-vb] a [noun] [prep] | 6 |
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when [v-ing] [to-vb] a [noun] [prep] Next page
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