英语语法分析

It must have been nearly three months before I heard from Ainsworth, and in fact I had begun to wonder at the Bassets' long symptomless run when she came on the phone.

我再次和安斯沃思太太有联系必是在将近3个月以后了。实际上，她来电话前，我已经感到奇怪，这么长时间她那3只短腿猎犬竟然一点病症也没有。