1. **否定句**:结构为“主语 + be + not + v.ing”。原肯定句主句为“Sandy is swimming now”,否定形式需在“is”后加“not”,即“Sandy is not swimming now”(或缩写为“isn’t”)。 2. **一般疑问句**:结构为“Be + 主语 + v.ing?”,需将“is”提到主语“Sandy”前,即“Is Sandy ...
Grammatical tense refers to the conjugation of a verb to reflect its place in time—that is, when the action occurred. There are technically only two grammatical tenses in English: the past and the present. Verbs in their basic form inherently describe the present time, and they can be conju...
past progressive,past progressive tense- a progressive tense used to describe on-going action in the past; "`I had been running' is an example of the past progressive" future progressive,future progressive tense- a progressive tense used to express action that will be on-going in the future;...
动词过去式变化规则及其读音规则(Thechangerulesofthepasttenseofverbsandtheirpronunciationrules)Thechangerulesofthepasttenseofverbsandtheirpronunciationrules1,ingeneral,theverbsuffix-ed,suchas:Work---workedwork,play---playedplay,5---wantedwantsact---actedtoplay2,totheendof-epronunciationverb,verbsuffix...
5. For verbs ending in "ic", add "ked" instead of just "ed" (e.g. panic→panicked, picnic→picnicked). Exercise: Verb to Past Tense Change each verb into its past tense form by adding "ed" and use it in a sentence. VerbPast TenseUse it in a Sentence jump The children.___ov...
The past progressive, sometimes known as the Past Continuous verb tense, is formed by adding the past variant of to be’ with the infinitive and ending with -ing’ (e.g. to sing’ becomes I was singing’). The past progressive is used to write or talk about an action that started som...
动词过去式变化规则及其读音规则（The change rules of the past tense of verbs and their pronunciation rules）The change rules of the past tense of verbs and their pronunciation rules 1, in general, the verb suffix -ed, such as:Work ---worked work, play---played play, 5---wanted wants ac...
To form the future perfect continuous, the verb "will have been" or "shall have been" is used. The main verb should always be in its base form (i.e., without -ing or -ed). When forming the future perfect and future perfect continuous, the main verb should always be in its past ...
Started in the past and ended in the past BUT continues to have some relevant effect in the present. Started in the past and continues to happen now and into the future. It is formed with a passive variant of the verb to have + the present participle (verb form ending in -ing). ...
The past continuous tense is formed with a past tense conjugation of to be and the present participle (the -ing form) of the main verb. They were playing outside when it started to rain. When should you use the past continuous tense? Use the past continuous tense to show a past action...