英语语法题(92)-动词的时态和语态 P149 No.4In such dry weather,the flowers will have to be watered if they _____.A.have survived B.are to survive C.would survive D.will survive答案+思路,3Q

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英语语法题(92)-动词的时态和语态P149No.4Insuchdryweather,theflowerswillhavetobewateredifthey_____.A.havesurvivedB.

英语语法题(92)-动词的时态和语态 P149 No.4In such dry weather,the flowers will have to be watered if they _____.A.have survived B.are to survive C.would survive D.will survive答案+思路,3Q
英语语法题(92)-动词的时态和语态 P149 No.4
In such dry weather,the flowers will have to be watered if they _____.
A.have survived B.are to survive
C.would survive D.will survive
答案+思路,3Q

英语语法题(92)-动词的时态和语态 P149 No.4In such dry weather,the flowers will have to be watered if they _____.A.have survived B.are to survive C.would survive D.will survive答案+思路,3Q
答案B.
只要理清句意就知道了...if they___,显然意思是如果它们要活下来的话...排除了A,C,D...

B
为了活下来:to survive

B ,D 都可直接排除,因为be+ to do的形式就等于will,用A句意不通,而且时态不一致。只有是 D了。此用法为虚拟语气。
句意:在如此干燥的天气下,如果花有生存的权力,你就必须给它们浇水。

B be to do 是将来时的一种形式

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