. . 一般现在时基本知识一：一般现在时：表示经常性的事情。时间状语： often 经常, usually通常, always总是， every 每个, sometimes有时， at ⋯在几点钟只有第三人称单数用动词三单，其余动词均用原形三单变化：多数在动词后加s play — plays like— likes 以 s，x，sh，ch，o 结尾的动词加 es go — goes wash--washes 以辅音字母加 y 结尾，把 y 改 i 再加 es fly— flies 二：基本结构：动词原形（如主语为第三人称单数，动词上要改为第三人称单数形式）三：否定形式： am/is/are+not;此时态的谓语动词若为行为动词，则在其前加 don't,如主语为第三人称单数，则用doesn't ，同时还原行为动词。四：一般疑问句：把be 动词放于句首；用助动词do 提问，如主语为第三人称单数，则用does，同时，还原行为动词。五：但是，动词 to be 和 to have 的一般现在时的形式特殊如下：一般动词的词形变化 To be 的词形变化 To have 的词形变化I know it I am a student I have a pen. You know it. You are a student You have a pen He (she) knows it. He (she) is a student. He (she)has a pen. We (you,they) know it. We (you,they) are students. We (you,they) have pens. 六：习题及部分答案一、写出下列动词的第三人称单数talk______forget______hope______stop______perform______p lay______ say______ buy______worry______fly______study_______like_______make______ take______ love_______recite_______become_______come_______drive_______ shine_______ . . leave_____wake_______ride_______write_______hike______give______ see______swim______stop______shop_______plan______get_______ sit_______let_______ cut_______run_______forget_______begin_______wash_____watch_______ finish______teach_____fish_______reach_______go_______do_____ 二、用括号内动词的适当形式填空。1. He often ________(have) dinner at home. （答案： has）2. Daniel and Tommy _______(be) in Class One. （答案： are ）3. We _______(not watch) TV on Monday. （答案： doesn’t watch ）4. Nick _______(not go) to the zoo on Sunday. （答案： doesn’t go ）5. ____...
