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English · CEFR Band 1 (A1) · Chapter 45

It was late, so I went home

Why are you tired?

  1. Emma Minsu, you look tired today. Why?
  2. Minsu Because I studied all night, so I am sleepy.
  3. Emma Use just one — say "I studied all night, so I am sleepy", or "I am sleepy because I studied all night".
  4. Minsu Ah! I am sleepy because I studied all night. But the test was easy!
  5. Emma Good! So you can relax now and rest.
  6. Minsu Yes. I will sleep, and then I will celebrate!

We finished the course!

  1. Jack Emma, we finished the English course! Are you happy?
  2. Emma Yes, really happy! It was hard, but I learned a lot.
  3. Jack Me too. So let's celebrate together this weekend.
  4. Emma Great idea! We can go to the beach or watch a film.
  5. Jack The beach, because the weather is nice. And then we can eat dinner.
  6. Emma Perfect. Finally, we can relax. Well done, everyone!
汉字PinyinPOSMeaning
and conj. and
but conj. but
or conj. or
so conj. so
because conj. because
also adv. also
then adv. then
again adv. again
together adv. together
everyone pron. everyone
finally adv. finally
really adv. really

Joining sentences: and, but, so, because Joining sentences: and, but, so, because

Four little words let you join two ideas into one sentence. "and" ADDS a similar idea: "I like tea and coffee", "She reads and writes". "but" shows a CONTRAST: "I like tea but not coffee", "It is small but comfortable". "or" gives a CHOICE: "Tea or coffee?", "We can walk or take the bus". "so" shows a RESULT — it goes between the cause and the result: "It was late, so I went home" (cause + so + result). "because" gives a REASON — it goes before the reason: "I went home because it was late" (result + because + cause). So "so" and "because" describe the SAME situation from opposite ends: you can say "I was tired, so I slept" OR "I slept because I was tired", and the order of cause and result flips. Two rules: (1) use only ONE connector per link — do not use "because" and "so" together; (2) in writing, we usually put a comma before "but" and "so" when they join two full sentences. Note: many learners mark both the cause and the result at once, copying their first language: "Because I was tired, so I slept" ✗. Keep just one: "I slept because I was tired" ✓ or "I was tired, so I slept" ✓.

Four little words let you join two ideas into one sentence. "and" ADDS a similar idea: "I like tea and coffee", "She reads and writes". "but" shows a CONTRAST: "I like tea but not coffee", "It is small but comfortable". "or" gives a CHOICE: "Tea or coffee?", "We can walk or take the bus". "so" shows a RESULT — it goes between the cause and the result: "It was late, so I went home" (cause + so + result). "because" gives a REASON — it goes before the reason: "I went home because it was late" (result + because + cause). So "so" and "because" describe the SAME situation from opposite ends: you can say "I was tired, so I slept" OR "I slept because I was tired", and the order of cause and result flips. Two rules: (1) use only ONE connector per link — do not use "because" and "so" together; (2) in writing, we usually put a comma before "but" and "so" when they join two full sentences. Note: many learners mark both the cause and the result at once, copying their first language: "Because I was tired, so I slept" ✗. Keep just one: "I slept because I was tired" ✓ or "I was tired, so I slept" ✓.

  • I like tea and coffee. I like tea and coffee.
  • I like tea but not coffee. I like tea but not coffee.
  • It was late, so I went home. It was late, so I went home.
  • I went home because it was late. I went home because it was late.
  • Do you want tea or coffee? Do you want tea or coffee?

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