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题库 / GMATAdvanced-SC-20
One analyst of the liquor industry estimated that this year a few liquor stores have experienced declining sales of up to fifty percent but predicted that the industry as a whole will maintain a volume of sales fairly close to last year.
declining sales of up to fifty percent but predicted that the industry as a whole will maintain a volume of sales fairly close to last year
declines in sales of up to fifty percent but predicted that the industry as a whole would have maintained a volume of sales fairly close to last year
up to fifty percent in declining sales but predicted that the industry as a whole would maintain a volume of sales fairly close to last year’s
sales declines of up to fifty percent but predicted that the industry as a whole would maintain a volume of sales fairly close to last year’s
declines up to fifty percent of sales but predicted that the industry as a whole will have maintained a volume of sales fairly close to last year’s
如果predicted后面应该接would (not will) 好奇为什么estimated后面接have experience,不是had experienced???
have experienced 表示动词先时性，experienced 这个动作先于estimated 发生，并且已经产生了结果，即sales declines of up to fifty percent，所以不用have been experiencing
简单来说
一个句子同时出现过去时和现在时，可接受
一个句子同时出现现在时和将来时，可接受
一个句子同时出现过去时和将来时，不能接受
栗子
If you go, I will go. 对
If you went, I would go. 对
If you went, I will go. 错
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