______ I have learned about 2,000 English words.

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______ I have learned about 2,000 English words.
A.By far B.So far C.By the end of last
week D.As far as now
其他的为什么不行?

到目前为止,我学了2000个英语单词.此句时态为现在完成时,故选so far~
至于为什么其他的不行：
1) by far 的意思是”.的多,最.“
比如说:He is by far the best student in my class.他显然是我们班最好的学生~
This is better by far.这个好多了~
2) by the end of last week 到上周末为止,说白了就是老师常说的过去的过去,它对应的是过去完成时,跟题目时态不符~
3) D选项,惭愧,没见过这个用法,
PS:刚看到楼主在下面说by far也有"到目前为止"的意识,有的电子词典的确有次解释,但是我看了很多的例句都没有这个意思.而且by far在很多时候只是加深一下程度,有他没他句子都说得通,没有太特定的含义~

______ I have learned about 2,000 English words. so far we learned about 2,000 English words.哪错了 how many English words have you learned about 形容词i have learned about five hundred chinese words.我认为 How long have you learned English?I have learned English () i have also learned many english words from rhese songs 的意思把下面句子改为被动句I have learned English for about two years English we have learned two thousand English words 的被动句把下列句子改成被动语态：I have learned English for about two years what have you learned about the figurative use in english have learned English for about two years 的被动语态 I have learned English 变为过去式时,have用变吗?