英语用所给动词适当形式填空要理由49，50 英语用所给动词适当形式填空要理由45，46
\u82f1\u8bed\u7528\u6240\u7ed9\u52a8\u8bcd\u9002\u5f53\u5f62\u5f0f\u586b\u7a7a\u8981\u7406\u753149.\uff0c50walking\u8fd9\u4e2a\u662f\u52a8\u540d\u8bcd\u505a\u4e3b\u8bed
to drive \u8fd9\u4e2a\u662f\u56fa\u5b9a\u642d\u914d it takes sb st to do sth
是只要49和50的答案理由吗？
49.helps 句中有一个often,经常的意思，说明这是经常反复发生的动作，应该用一般现在时态，而主语Mary是第三人称单数，谓语动词要使用三单形式，在help末尾加上s.
50.working,这道题考得是 find sb doing sth发现某人正在做某事。整个句子的意思是：当我到达那里的时候，我发现Philip正在努力学习/工作。
希望我的回答能够让你满意，大家一起共同进步。
helps,often表示一般现在时
49helps
49，helps(三单现，，前面有often)，，50，was working(前面是when，所以后面加ing)
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