The 80000 objects collected by Sir Hans Sloane_______(form) the core
collection of the British Museum opened in 1759.(2022新高考I) 官方答案是formed,这里为什么不能用had formed?
...语从句要用一般现在时,而不能直接用一般将来时。如:If you don’t go, I will not go either. 你若不去,我也不去。When it gets warmer the snow will start to melt. 天气变暖时,雪开始融化。但有时从句可以用现在完成时,能请老师讲讲这方面...