since then与什么时态连用I bought my laptop last March and it ___me everywhere since then.A follows B followed C is following D has followed是B还是D

since then与什么时态连用I bought my laptop last March and it ___me everywhere since then.A follows B followed C is following D has followed是B还是D since then和什么时态连用, 一定是现在完成时么 from then on与什么时态连用 since the last of last year与什么时态连用 ever since是什么意思,和什么时态连用? ever since 的用法ever since 和什么时态连用? never与什么时态连用? 现在完成进行时态与什么连用for+ ———— since+ —————— 连用 from then on after that since then from now on希望有易懂点的.最好有一般和什么时态连用,放句子什么部位. since then后接什么时态 by now 一般与什么时态连用? at that time与什么时态连用? all the time与什么时态连用 eight years later与什么时态连用 a few times与什么时态连用? a few times与什么时态连用 several days ago与什么时态连用 since then,I （ ）beijing A.have left B.left C.have leave D.leaving但for和since不是不能和短暂性动词连用么?