Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over North America.
语法 Sentence Correction-478
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正确的用户笔记
lyqsunny 2014-07-03 20:43:41
Have been discovered的时态问题，discovered 是瞬时性动词，不可与HAVE BEEN 搭配
香蕉小姐 2015-05-03 15:50:55
未体现逻辑意思
leelokwan 2015-10-20 10:11:30
have been discovered 是错的！discover是瞬时性动词
karenning 2016-07-06 23:49:57
"have been" - wrong
snow199511 2016-06-09 16:46:34
where they have been first discovered
Sissi0527 2016-06-02 05:12:48
还是Have been discovered的时态问题。改成were discovered。pear points后面应该加with表示描述带有纵向沟痕的。
siasiasia 2016-04-14 21:05:12
discover不用完成时态；
lyf0420 2015-11-28 22:22:54
语法--have been first discovered...时态:一般过去ok
你好我是豆沫君 2015-10-16 15:13:05
discover是瞬时动作，不能用于现在完成时。spear points with....with表伴随状态
celestine0313 2015-09-29 17:31:11
they have been first discovered时态错误，并且有修饰site的歧义
kaka0806 2015-08-22 00:11:39
discover是瞬时动作，不能用于现在完成时。spear points with....with表伴随状态
violayan8023 2015-08-21 18:05:06
they have been first discovered 时态错
