题目内容
20．Could you give me a hand when I am in need？Of course I______．（ ）| A． | can | B． | could | C． | may |
分析 --当我需要时你能帮下忙吗？
--当然，我能．
解答 答案：A 考查情态动词．考查固定用法：can 表示"可以，能够"，即表示允许或者能力．could一般用于过去式，作can的过去式用．但也可用于现在时中，表达委婉．
may 也可表示"可以"的意思，表征求意见或允许，根据句意当我需要时你能帮下忙吗？应该是表示能力，前句的表达是一种委婉的说法，could并非过去式，所以回答仍用can．故选择A．
点评 考查情态动词．能掌握情态动词的基本用法是解决此类题的关键．解答应和ji解答应和句子
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