only according to the directions can theOnly ____ according to the directions can the medicine be quite effective.A.taking B taken Cbeing taken Dhaving been taken是条件状语从句的省略吗

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only according to the directions can theOnly ____ according to the directions can the medicine be quite effective.A.taking B taken Cbeing taken Dhaving been taken是条件状语从句的省略吗
only according to the directions can the
Only ____ according to the directions can the medicine be quite effective.
A.taking B taken Cbeing taken Dhaving been taken
是条件状语从句的省略吗

only according to the directions can theOnly ____ according to the directions can the medicine be quite effective.A.taking B taken Cbeing taken Dhaving been taken是条件状语从句的省略吗
答案选B.可以理解为条件状语从句,省去了同主句相同的主语和系动词.

你好。
1 因为强调的是“一贯的,规律的”,所以我们用taken. ==only if it IS TAKEN-------一般不用完成式结构------has been taken / having been taken .
2 having been taken往往与有for-- -- , since-- - - - 这样的时间状语的短语结构一起使用。
是否可以解决...

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你好。
1 因为强调的是“一贯的,规律的”,所以我们用taken. ==only if it IS TAKEN-------一般不用完成式结构------has been taken / having been taken .
2 having been taken往往与有for-- -- , since-- - - - 这样的时间状语的短语结构一起使用。
是否可以解决您的问题?

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