1. The cake is being cut with a sharp knife by Mary.
2. A lot of homework is being done by all of my students now.
Form: S + is/am/are/was/were (not) + being + V3 + by O
3. My bicycle was lost yesterday.
Form: S + was/were (not) + V3 + by O
1. The cake is being cut by Mary with a sharp knife.
2. A lot of homework is being done by all of my students now.
3. My bicycle was lost yesterday.
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