while是同时,当的意思,用while连接时前后时态保持一致.
应改成:Were you smiling when you finished reading this essay?这是问已经发生的.
Will you smile when you finish reading this essay?这是将来发生的.
while是同时,当的意思,用while连接时前后时态保持一致.
应改成:Were you smiling when you finished reading this essay?这是问已经发生的.
Will you smile when you finish reading this essay?这是将来发生的.