Normally the present perfect tense corresponds to perfect Spanish, although the equivalence fluctuates, since Spanish uses the present perfect for past actions in some cases where English uses simple past (present perfect simple).
affirmative:
subject + have / has + past participle of the verb is conjug
ated.
I/ we/ you/ they have worked ( I´ve/ you´ve/ they´ve worked)
he/ she/ it has worked ( he´s/ she´s / it´s worked)
negative.
subject + have / has + not + past participle of the verb is conjugated.
I / we/ you/ they have not worked ( I/ we/ you/ they haven´t worked)
he/ she/ it has not worked ( he / she/ it hasn´t worked)
interrogative
have I /we/ you / they + worked
has he / she/ it + worked
TAG QUESTIONS
A tag question is a special construction in English. It is a statement followed by a mini-question. The whole sentence is a "tag question", and the mini-question at the end is called a "question tag"
We use tag questions at the end of statements to ask for confirmation. They mean something like: "Am I right?" or "Do you agree?" They are very common in English.
PASSIVE VOICE
Passive voice is used when the focus is on the action. It is not important or not known, however, who or what is performing the action.
Passive voice is used when the focus is on the action. It is not important or not known, however, who or what is performing the action.
Form of Passive
Subject + finite form of to be + Past Participle (3rd column of irregular verbs)
Example: A letter was written.
When rewriting active sentences in passive voice, note the following:
- the object of the active sentence becomes the subject of the passive sentence
- the finite form of the verb is changed (to be + past participle)
- the subject of the active sentence becomes the object of the passive sentence (or is dropped)
In most English sentences with an action verb, the subject performs the action denoted by the verb.
These examples show that the subject is doing the verb's action.
