when were these houses built ?
when ___ these houses built
如果選1 那後面的動詞built 不就要改成ing
- LouisLv 71 0 年前最佳解答
- ?Lv 71 0 年前
"When these houses have been built"不是完整句子
1. When were these houses built?
2. Since when have these houses been built? (少了Since, 時態就不正確)
- leoLv 61 0 年前
When were these houses built = When these houses have been built