The teacher is good at ___(sing).She ___(sing)a song just now.

问题描述:

The teacher is good at ___(sing).She ___(sing)a song just now.

singing
sang
祝你学习成功.不明白的可以再追问我.第一个singing是因为at是介词,后面要跟动名词吗?第二个为什么用sang?just now 刚刚的意思。说以这句话的意思就是她刚刚唱了一首歌 (过去时态吧)所以用 sang 不明白再追问