English Numbers
Overview
Ordinal numbers, cardinal numbers
To form a number between 20 and 100, we use the same principle: Base number (tens) + digit (ones).
23 = twenty-three, 33 = thirty-three, 43 = forty-three, etc.
To form a number with 100, we say “One hundred” + and + base number + digit, but sometimes the “and” is omitted, such as when counting.
123 = One hundred and twenty-three.
234 = Two hundred and thirty-four
345 = Three hundred and forty-five
To form a number in with thousand, we say “one thousand + one hundred + and + digit”
1234 = One thousand two hundred and thirty-four.
2345 = Two thousand three hundred and forty-five.
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Additional Topics
This unit covers subordinating conjunctions, including after, although, because, before, if, and since. These occur at the beginning of subordinate or dependent clauses, and are used to combine independent and dependent clauses together.
Common European Framework of Reference for Languages
The CEFR is an international standard used to describe language ability. Here are specific details of the CEFR for this topic.