Common Mistakes : Ago
Ago – Adverb
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BAD: The accident happened at ten years ago
GOOD: The accident happened ten years ago
BAD: I came to England in two years ago
GOOD: I came to England two years ago
BAD: He went to Sydney before five years ago
GOOD: He went to Sydney five years ago
BAD: I started learning English since two years ago
GOOD: I started learning English two years ago
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BAD: I’m writing in reply to your letter that I’ve received two days ago
GOOD: I’m writing in reply to your letter that I received two days ago
With references to past time such as yesterday, last week, a year ago , use a past tense (NOT the present perfect): ‘I came to England exactly six months ago. NOT ‘have come
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BAD: The train left at exactly 3 o’clock. Just five minutes ago I had been stuck in a traffic jam
GOOD: The train left at exactly 3 o’clock. Just five minutes before I had been stuck in a traffic jam