主语 be able to do sth-2025-2026学年八年级英语下册句型辨析（北师大版）

初二下册北师大版 【句型精讲】 主语+be able to do sth 核心句型 【句型辨析】主语+be able to do sth 初中英语·北师大版初二下册 句型辨析精讲 辨析一be able to vs can 维度 be able to can 时态变化可用于各种时态（现在、过去、只有现在时(can)和过去时 将来、完成时等) (could)两种时态 强调含义 强调通过努力或具备某种能表示与生俱来的能力或客观 力而“能够”做某事，更正式可能性，更口语化 句式功能 可用于不定式、动名词等非谓不能用于非谓语结构 语结构 例句对比 She will be able to speak English well next year.(将来时，强调通过学习获得能力) She can speak English well.(现在时，表具备的能力) 真题链接（北师大版初二下册期末真题） My brother swim when he was five,and now he swim very fast. A.can;is able to B.could;was able to C.could:is able to 答案：C解析：第一空描述过去的能力，用could:第二空强调现在通过练习具备的能力，用is able to,选C。 1 初二下册北师大版 【句型精讲】 主语+be able to do sth 辨析二be able to vs manage to do sth 维度 be able to manage to do sth 含义侧重 表示具备做某事的能力，不强强调经过努力“设法做成”某 调结果 事，暗含成功的结果 情感色彩中性，仅说明能力 带有“克服困难后成功”的积 极含义 句式结构直接接动词原形 接动词原形，强调动作的完成 例句对比 He is able to solve this problem.(有能力解决，但未说是否解决) He managed to solve this problem after trying many times.(经过努力成功解决) 真题链接（北师大版初二下册同步练习） Although the task was difficult,they finish it on time. A.were able to B.could C.managed to 答案：C解析：句中“Although the task was difficult”暗示克服困难，强调成功完成，用managed to,选C。 辨析三be able to vs have the ability to do sth 维度 be able to have the ability to do sth 语体风格 更口语化，日常使用频率高 更书面化、正式，多用于正式 文体或强调能力本身 结构简洁性结构简单，直接表达“能够” 结构相对复杂，强调“拥有… 的能力”这一状态 例句对比 She is able to dance very well..(日常表达) She has the ability to dance very well.（正式表达，强调具备跳舞的能力) 真题链接（北师大版初二下册月考真题） 2 初二下册北师大版 【句型精讲】 主语+be able to do sth Everyone the ability to learn,but not everyone uses it well. A.is able to B.has C.can 答案：B解析：空后为“the ability to learn”,需用“has the ability to do sth”结构，选B。 综合训练 1.My sister ride a bike when she was six,and now she ride 20 kilometers a day. A.can;is able to B.could,was able to C.could;is able to 2.Although the math problem was hard,little Tomwork it out with his teacher's help. A.was able to B.could C.managed to 3.Everyone the ability to succeed,but only those who try hard will achieve their goals A.is able to B.has C.can 4.Shespeak three languages now because shepractice every day for five years. A.can;was able to B.is able to;has been able to C.could:managed to 从be able to/can/manage to/have the ability to中选择合适的词并用其适当形式填空 1.My little brother walk when he was ten months old.He was very smart. 2.They tried many times,and finally they win the basketball game 3 初二下册北师大版 【句型精讲】 主语+be able to do sth 3.You pass the exam if you study hard from now on. 4.All children learn new things quickly if they are interested in them. 1.He can swim across the river.(用be able to改写，保持原意) 2.She managed to finish the project on time..(改为否定句，强调未成功) 3.The boy has the ability to play the piano well..(用be able to改写，更口语化) I.单项选择 1.C2.C3.B4.B I.选短语填空/完成句子 1.could 2.managed to 3.will be able to 4.have the ability to L.句型转换 1.He is able to swim across the river. 2.She didn't manage to finish the project on time. 3.The boy is able to play the piano well.