الخطوة 1اختر الخيار الصحيح
الخطوة 2أضف التدريبات التي تعجبك إلى المفضلة
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
Use the past perfect when the time of one past action is more past than that of another. Put the action which was completed first in the past perfect and the second action in the past tense.
Don't use the present tense and the past perfect in the same sentence. It would be incorrect to say: My brother says that he had not gone to the cinema last night.
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.
After the verbs can, must, may, shall, and will, use the infinitive without to , and not the third person of the present.