我是因為太忙,所以才沒有回信給你的。

I didn't answer your letter, because I was busy.

Source: Tatoeba

Sentence Composition

1
  1. I
  2. me
  3. my
=2 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 shì variant of shì
3 因為 yīnwèi
  1. because
  2. owing to
  3. on account of
=4 tài
  1. highest
  2. greatest
  3. too (much)
  4. very
  5. extremely
=4
  1. (Korean Classical Chinese) soybean
  2. (obsolete on its own in Standard Chinese) only used in 太末
  3. only used in 太末
  4. soybean
5 máng
  1. busy
  2. hurriedly
  3. to hurry
  4. to rush
6 所以 suǒ
  1. therefore
  2. as a result
  3. so
  4. the reason why
=7 cái
  1. ability; talent
  2. sb of a certain type
  3. a capable individual
  4. then and only then
  5. just now
  6. (before an expression of quantity) only
=7 cái
  1. (variant of cái) just now
  2. (variant of cái) (before an expression of quantity) only
8 沒有 méiyǒu
  1. haven't
  2. hasn't
  3. doesn't exist
  4. to not have
  5. to not be
9 回信 huíxìn
  1. to reply
  2. to write back
  3. letter written in reply

classifier:

=10 gěi
  1. to
  2. for
  3. for the benefit of
  4. to give
  5. to allow
  6. to do sth (for sb)
  7. (grammatical equivalent of )
  8. (grammatical equivalent of )
  9. (sentence intensifier)
=10
  1. to supply
  2. to provide
=11 you (informal, as opposed to courteous nín)
=11 you (Note: In Taiwan, is used to address females, but in mainland China, it is not commonly used. Instead, is used to address both males and females.)
=12 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 de "one made of leather" or 跑堂兒的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. or di in poetry and songs
=12 a taxi; a cab (abbr. for 的士 shì)
=12 really and truly
=12 (bound form) bull's-eye; target