PASO 1Elige la opción correcta
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If you begin with a verb referring to past time, keep the verb forms in the past. The same rule applies to tenses throughout a composition.
Use the simple past tense to express a habit in the past, and not the past continuous
Use the past continuous tense to describe events in the past happening at the time another action took place: I was walking to school when I met him.
When the verb in the main clause is in the past tense, use a past tense in subordinate clauses.
This rule doesn't apply (1) to verbs within quotations, (2) to facts that are true at all times. We say:
1. She said, 'I am waiting for your answer'
2. He said that London is a great city
After the auxiliary does use the infinitive without to, and not the third person of the present.
The answer to a question beginning with Does is always in the present tense, third person: Does he like the cinema? - Yes, he likes the cinema; or Yes, he does.