The train is supposed to have arrived =The train should have arrived =The train was supposed to arrive =The train was to have arrived.都相等嗎?
- LouisLv 74 年前最佳解答
1. The train is supposed to have arrived.
2. The train should have arrived.
3. The train was supposed to arrive.
4. The train was to have arrived.（be + to arrive是未來式的相等語：= will arrive，所以was to have arrived = would have arrived；不定詞用完成式表示發生的時間點比主要動詞was更「早」）