UNIT 9C: Past Simple or Present Perfect?

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Clink on the link below and find a detailed explanation + activities to practise!

http://www.ego4u.com/en/cram-up/grammar/simpas-preper

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Simple Past – Present Perfect Simple

Form

Simple Past	Present Perfect Simple
irregular verbs: see 2nd column of irregular verbs Example: I spoke	irregular verbs: form of 'have' + 3rd column of irregular verbs Example: I / you / we / they have spoken he / she / it has spoken
regular verbs: infinitive + ed Example: I worked	regular verbs: form of 'have' + infinitive + ed Example: I / you / we / they have worked he / she / it has worked