初中英语第五册第一课课文中有这样一个句子:“Ever since then,he(the bat)comes out only at night.”句中谓语用现在一般时,多数学生感到困惑不解,认为句中comes out似应改成has come out才正确。 一般而言,since短语与since从句衷述时间时,通常与句子(或主句)谓语动词的现在完成时连用。例如: In the first lesson of the fifth grade of junior middle school English, there is a sentence like this: “Ever since then, he (the bat) come out only at night.” When the predicate in the sentence is used now, most students feel puzzled and think that It seems that comes out should be changed to have come out correctly. Generally speaking, since and since clauses are devoted to time, they are often used in conjunction with the completion of the predicate verb of the sentence (or main sentence). E.g: