摘要: Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 句子中两个以whether引导的从句均为名词性从句, 前者是主语从句.后者是宾语从句.在引导宾语从句时通常既可以用if也可以用whether, 但是引导主语从句.表语从句或同位语从句时通常多用whether而不用if.如: Henry asked if / whether he could go surfing on the Internet then. 亨利问他那时是否可以上网. I worry about whether I hurt her feelings. 我担心是否伤害了她. Her question is whether humans will be able to live on Mars. 她的问题是人类将来能否在火星上生活. Whether Mr Black will go to the conference doesn’t matter at all. 布莱克先生与会与否无关紧要.

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