(b) contains bad parallelism. since you're talking about two trends that have taken place simultaneously, you MUST use the same verb tense to describe those trends. in (b), the first verb (has ... added) is in the present perfect, but the second (increased) is in the simple past. i don't care whether you actually know what these tenses are called, provided that you can recognize that they are different. the parallelism in (a) is perfect: both verbs (has ... added and have ... increased) are presented in the same tense.
has added和increased时态不平行。has done是现在时,-ed是过去时
判断时态是否平行,要判断动作的发生顺序,是同时,还是一前一后,这里动作应该是同时发生的,所以时态要一致。
(b) contains bad parallelism. since you're talking about two trends that have taken place simultaneously, you MUST use the same verb tense to describe those trends. in (b), the first verb (has ... added) is in the present perfect, but the second (increased) is in the simple past. i don't care whether you actually know what these tenses are called, provided that you can recognize that they are different.
时态问题
has recently addded increased 时态不平行
has added...and ...increase: and前后动词时态不平行;although 后面一定要跟完整句子。
如果开饭店用现在完成时,销量好用一般过去时,就变成了先收入好,后开饭店;add new restaurant之后才有sales增加,所以add用完成时,sales increase应该用完成时
has recently added… and… increased时态不平行,发生在同一时间的事情应该用统一时态。
has recently added… and… increased时态不平行,发生在同一时间的事情应该用统一时态。
B. has recently added… and… increased时态不平行,发生在同一时间的事情应该用统一时态。Although the restaurant company has recently added … and its sales have increased … , its sales … have declined.
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