Present perfect for, since, just, Diapositivas de Inglés

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Present Perfect

FOR SINCE

• FOR + period of time.
• FOR + number + time Word. When we measure the duration of something or how long it lasts. It has a start point and end point and can be used in different tenses.
  • SINCE + starting point.
  • SINCE + a time / a date. When something started in the past and continues until now. Since is mostly used in the present perfect and perfect progressive tense.

Examples:

• (^) We have been waiting for you SINCE 3 o’clock.
• (^) You have worked here SINCE you left your school.
• (^) I have worked here FOR 8 years.
• (^) They have been at the hotel SINCE last week.
• (^) I’ve trained FOR two months.
• (^) We have taught at this school FOR a long time.
• (^) Jane had only been working at the factory FOR three months when it closed.
• (^) My brother has been sick SINCE Friday.

JUST

• MEANING: A short time ago.
• POSITION: Before the past participle.

ALREADY

• MEANING: Before expected / before now.
• POSITION: Before the past participle.

YET

• MEANING: Until now / up to now.
• POSITION: Usually at the end.
• USE: In negative sentences and questions.

Should Shouldn't should + infinitive

• we use should and shouldn´t to give advice or to talk about what we think is right or wrong.
• You should means something like I think it is a good idea for you to do it.
• You shouldn’t means something like I think it is a bad idea for you to do it.
• Should is used to express the opinión of a speaker and often follows I think or I don’t think.
• Mild obligation or advice. You should save some money.
  • Mild negative obligation or advice You shouldn't smoke so much.

Examples:

• (^) I SHOULD get up early.
• (^) You SHOULD sleep 7 hours.
• (^) You SHOULDN’T eat chocolate.
• (^) I SHOULDN’T do to bed late.
• (^) SHOULD he do sports?