Present perfect

Form
1. Affirmative
  1. S + have/has + past participle I have tried lasagna before
2. Negative
  1. S + have/has + not + past participle I have not tried lasagna before
3. Interrogative
  1. Have/has + S + past participle Have you tried lasagna before?
4. We form the present perfect tense with have/has + past participle
  1. Have: I You We They
  2. Has: He She It
Using FOR and SINCE in present Perfect
1. FOR + period of time + number + time word
  1. We use FOR to talk about a length of time, a period of time.
  2. When we measure the duration of something or how long it lasts.
  3. It has a start point and an end point and can be used in different tenses.
  4. - I studied English in Boaton for 2 yeras. - I will be there for around five months. - We have been married for 20 years.
  5. -For ten minutes -For eight hours -For five days -For six months -For three years -For two centuries
2. SINCE + starting point + a time / a date
  1. We use SINCE to talk about a point in the past,a specific point in time.
  2. When something started in the past and continues until now.
  3. Since is mostly used in the present perfect and perfect progressive tense.
  4. - He hasn't eaten since 7 o'clock. -I have been working here since June. - We have been married since 2015.
  5. -Since 5 o'clock -Since Monday -Since July -Since 1996 -Since I left school -Since the end of the century
The present perfect is used to talk about an event that began in the past and continues up to the present.

Resumen del Recurso

	Creado por Andrea cortes garavito hace alrededor de 5 años