初一英语四种时态讲解.doc

初中英语四种时态详细讲解（适合初一学生）1. 一般现在时：（1） 表示经常发生（2） 构成：先看主语主语是三单，动词+s主语非三单，动词用原形。They often watch TV.He often watches TV.(3)变化：问句：主语前+do/does，动词用原形；否定：主语后+dont/doesnt，动词用原形。Do they often watch TV? They dont often watch TV.Does he often watch TV? He doesnt often watch TV.2. 现在进行时：a) 表示现在正在发生。句中常有now，look，listen等b) 构成：主语+be+doing She is watching TV now.c) 变化问句：提前be（am，is，are）Is she watching TV now?否定：be后+notShe isnt watching TV now.d) 加ing的方法：一般直接+，去不发音的e加，闭音节双写+。3. 一般过去时：a) 表示 过去的动作或状态，句中常有yesterday，last等过去的时间。b) 构成：动作：主语+动词的过去式状态：主语+was/were(句中没实意动词)She watched TV last night.She was here last night.c) 变化：问句：主语前+did，动词用原形Did she watch TV last night?Was she here last night?否定：主语后+didnt,动词用原形。She didnt watch TV last night.She wasnt watch TV last night.(4) 过去式：一般+ed；e结尾+d；辅音+y的，去y+ied；闭音节双写+ed；不规则的120页。4. 一般将来时：a) 表示：将来 ，句中有表示将来的时间：tomorrow、next、soon，in two days等b) 构成A:主语+will+do（任何人称）B:主语+shall+do（仅第一人称I，we）C:主语+be going to +do 如：A：She will watch TV this evening.B：We shall watch TV this evening.C：She is going to watch TV this evening.c) 变化问句：提前will/shall/beA:Will she watch TV this?B: Shall we watch TV ?C: Is she going to watch ?否定：在will /shall/be 后+notA: She wont watch TVB: We shall not watch shantC: She isnt going to watch There is a meeting next week.There was a meeting yesterda