求动词什么情况下加ing时,前面的字母要双答:动词 加ing时双写的情况如下:以重读闭音节结尾,末尾只有一个辅音字母的动词,要双写这一辅音字母,再加-ing.例如:begin-beginning, beg-begging, cut-cutting, get-getting; drop-dropping,run-running, swim-swimming, set-setting , sit–sitting, stop-stopping, put–putting,hit-hitting ; stop-...