英语三种基本时态: past, present, future
每种对应一个完成时态：表示动作先后顺序或者结果
对应一个进行时态：表示正在发生的动作
对应一个现在完成进行时态时态：表示到某个特定时间段 事情一直做
一般时态
Present Tense：一般现在时。表示一般不变化的事情，经常发生，经常做的事情，或用于描述一种自然物理科学现象，真理类的事情。会和often ， usually ， sometimes 搭配使用
Past Tense 一般过去时，说的是过去的事情，什么时间发生是什么事。没有时间提示，就按照前后文推断。一般结合具体时间，at 9 this morning/ yesterday/ last week/in 2010/after he left.
过去时要变化动词词形：规则词+ed/不规则动词变化大，熟练运用就行。
不规则动词存在原因：由古英语遗留而来，受多种语言影响
Future Tense 一般将来时，结合将来时间的短语表示放生在将来的事情。可以表示打算，或者计划。Will/be going to+动词原型 特殊用法：一般现在时+将来时间=确定将来要做的事情
Progressive Forms
Present Progressive Tense
Present progressive tense describes an ongoing action that is happening at the same time the statement is written. This tense is formed by
using am /is /are with the verb form ending in -ing . on society.
Past Progressive Tense
Past progressive tense describes a past action which was happening when another action occurred. This tense is formed by using was /were with the verb form ending in -ing . protests began on the streets.
Future Progressive Tense
Future progressive tense describes an ongoing or continuous action that will take place in the future. This tense is formed by using will be or shall be with the verb form ending in -ing . week.
Perfect Forms
Present Perfect Tense
Present perfect tense describes an action that happened at an indefinite time in the past or that began in the past and continues in the present.This tense is formed by using has /have with the past participle of the verb. Most past participles end in -ed . Irregular verbs have special past participles that must be memorized.
Past Perfect Tense
Past perfect tense describes an action that took place in the past before another past action. This tense is formed by using had with the past participle of the verb.
Future Perfect Tense
Future perfect tense describes an action that will occur in the future before some other action. This tense is formed by using will have with the past participle of the verb.
Perfect Progressive Forms
Present Perfect Progressive
Present perfect progressive tense describes an action that began in the past, continues in the present, and may continue into the future. This tense is formed by using has /have been and the present participle of the verb (the verb form ending in -ing ). profits would be larger.
Past Perfect Progressive
Past perfect progressive tense describes a past, ongoing action that was completed before some other past action. This tense is formed by using had been and thepresent perfect of the verb (the verb form ending in -ing ). extracurricular activities.
Future Perfect Progressive
Future perfect progressive tense describes a future, ongoing action that will occur before some specified future time. This tense is formed by using will have been and the present participle of the verb (the verb form ending in -ing ). Indo-European language family for more than 200 years.
英语三种基本时态: past, present, future
每种对应一个完成时态：表示动作先后顺序或者结果
对应一个进行时态：表示正在发生的动作
对应一个现在完成进行时态时态：表示到某个特定时间段 事情一直做
一般时态
Present Tense：一般现在时。表示一般不变化的事情，经常发生，经常做的事情，或用于描述一种自然物理科学现象，真理类的事情。会和often ， usually ， sometimes 搭配使用
Past Tense 一般过去时，说的是过去的事情，什么时间发生是什么事。没有时间提示，就按照前后文推断。一般结合具体时间，at 9 this morning/ yesterday/ last week/in 2010/after he left.
过去时要变化动词词形：规则词+ed/不规则动词变化大，熟练运用就行。
不规则动词存在原因：由古英语遗留而来，受多种语言影响
Future Tense 一般将来时，结合将来时间的短语表示放生在将来的事情。可以表示打算，或者计划。Will/be going to+动词原型 特殊用法：一般现在时+将来时间=确定将来要做的事情
Progressive Forms
Present Progressive Tense
Present progressive tense describes an ongoing action that is happening at the same time the statement is written. This tense is formed by
using am /is /are with the verb form ending in -ing . on society.
Past Progressive Tense
Past progressive tense describes a past action which was happening when another action occurred. This tense is formed by using was /were with the verb form ending in -ing . protests began on the streets.
Future Progressive Tense
Future progressive tense describes an ongoing or continuous action that will take place in the future. This tense is formed by using will be or shall be with the verb form ending in -ing . week.
Perfect Forms
Present Perfect Tense
Present perfect tense describes an action that happened at an indefinite time in the past or that began in the past and continues in the present.This tense is formed by using has /have with the past participle of the verb. Most past participles end in -ed . Irregular verbs have special past participles that must be memorized.
Past Perfect Tense
Past perfect tense describes an action that took place in the past before another past action. This tense is formed by using had with the past participle of the verb.
Future Perfect Tense
Future perfect tense describes an action that will occur in the future before some other action. This tense is formed by using will have with the past participle of the verb.
Perfect Progressive Forms
Present Perfect Progressive
Present perfect progressive tense describes an action that began in the past, continues in the present, and may continue into the future. This tense is formed by using has /have been and the present participle of the verb (the verb form ending in -ing ). profits would be larger.
Past Perfect Progressive
Past perfect progressive tense describes a past, ongoing action that was completed before some other past action. This tense is formed by using had been and thepresent perfect of the verb (the verb form ending in -ing ). extracurricular activities.
Future Perfect Progressive
Future perfect progressive tense describes a future, ongoing action that will occur before some specified future time. This tense is formed by using will have been and the present participle of the verb (the verb form ending in -ing ). Indo-European language family for more than 200 years.