因为so放在了句子前面表强调,所以主句倒装.
He was so convincing that most of us believed what he said.他说得这样让人信服以至于我们大多相信了他的话.
有时候,像only啊、so啊、such啊,放在句首表强调时,句子要倒装.
Only when you call me will I talk to you.只有你给我打电话时,我才跟你说.（否则别想）
So quick the earthquake happened that everyone was still in shock after two days.地震发生得如此快,以至于过了两天大家还是很惊异.