使役・知覚動詞の受動態
着眼点原形不定詞を取る make / see / hear / watch / feel は、受動態で to を復活させる。let は受動態を作らず be allowed to を使う。
| 能動態 | 受動態 |
|---|---|
| They made him wait. | He was made to wait. |
| I saw her enter the room. | She was seen to enter the room. |
| I heard him sing. | He was heard to sing. |
| They let him go. | He was allowed to go. |
| I saw her crossing the road.（現在分詞） | She was seen crossing the road.（分詞はそのまま） |
例文
1
The students were made to clean the classroom.
生徒たちは教室を掃除させられた。
2
A strange man was seen to enter the building.
見知らぬ男がその建物に入るのが目撃された。
注意×He was made wait. 分詞（-ing）が続く場合は to を付けない。have は受動態にならない。
確認問題
1
受動態に：The teacher made us write a report.
答え
We were made to write a report by the teacher.