1. The plane has just taken off (Past Simp./Present Perf.)

Past simple vs. Present Perfect
Do you remember the structures of Past Simple and Present Perfect Simple?
PAST SIMPLE | PRESENT PERFECT SIMPLE |
|
REGULAR VERBS |
Subject + verb -ed (+) |
Subject + have/has + verb -ed |
IRREGULAR VERBS |
Subject + 2nd column (+)
|
Subject + have/has + 3rd column |
Go back to the text in the previous section and make two lists: one with all the verbs in the Past Simple and another one with all the verbs in the Present Perfect Simple.
What time expressions are used with each of these tenses?
PAST SIMPLE
|
PRESENT PERFECT SIMPLE
(+ TIME EXPRESSIONS)
|
|

Important

Solved exercise
How do you form the negative and the interrogative forms of the Past Simple and the Present Perfect Simple?
AFFIRMATIVE | NEGATIVE |
INTERROGATIVE |
I worked He bought |
I _____ work He ________ |
Did you _____? ____ he _____? |

Pregunta Verdadero-Falso
Are the following sentences correct (true) or incorrect (false)? Use the time expressions and the context to help you decide.
Retroalimentación
Falso
Last year = definite time in the past. we can't use it with present perfect.
Retroalimentación
Verdadero
The action of being on the plane hasn't finished. It started in the past and has continued till now > present perfect.
Retroalimentación
Verdadero
So far indicates an action started in the past but hasn't finished yet > present perfect
Retroalimentación
Falso
Lately indicates time started in the past but continuing to the present > present perfect
Retroalimentación
Falso
We can't use present perfect with specific time phrases like ago. Correct sentence = Paco visited the museum a few days ago.
Retroalimentación
Falso
the month before = specific past so we can't use present perfect. > Before he came to Africa, Paco had visited America the month before
Retroalimentación
Falso
Since indicates an unfinished time period so we use it with present perfect. Therefore the main verb cannot be in past simple>
I have lived here since I was 10 years old. (since I was 10 is OK because it is part of the adverbial expression. It is the same as saying , for example, since 1995)
Retroalimentación
Verdadero
Here we can use present perfect because the activity has not finished. In Spanish you use a subjunctive (Cuando hayas terminado,....). In English, we don't really use subjunctives, just indicative tenses so thes entence is correct.

Pronunciation
Do you remember the rules for the -ed pronunciation?
There are three different ways of pronouncing the -ed ending. The difference depends on the final sound we pronounce in the infinitive form, if it is voiced (when the vocal cords vibrate) or voiceless (when there is no vibration). You can try this by putting your fingers in your throat when pronouncing a word!
- When the final sound is voiced, the -ed ending sounds /d/.
- When the final sound is voiceless, the -ed ending sounds /t/.
- When the final sound is either /t/ or /d/, then it sounds /Id/.
Decide the -ed pronunciation of these verbs: cooked, started, sailed, wanted, cleaned, asked, added, passed, listened.
/t/ |
/d/ |
/Id/ |

Further knowledge

Curiosity
Did you know the origin of the name 'Freetown', the capital city of Sierra Leone?
This country was founded at the end of the 18th century as a home for freed slaves, and this is the reason why its capital was called Freetown. It became a refuge for black people, mainly African slaves from North America who got their freedom and had supported the British in the American War of Independence. Interesting, isn't it?
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By Travlr, C. Commons |

Actividad
Here you have a summary of the differences between Past Simple and Present Perfect in Spanish: