diff --git a/1000-hours/sounds-of-american-english/2.2.3-td.md b/1000-hours/sounds-of-american-english/2.2.3-td.md
index e1594249..76ec0c13 100644
--- a/1000-hours/sounds-of-american-english/2.2.3-td.md
+++ b/1000-hours/sounds-of-american-english/2.2.3-td.md
@@ -64,7 +64,7 @@ In American English pronunciation, the consonant t and
- matter ˈmæt̬.ɚ
* **ght**
- caught kɑːt
- - taught not exist
+ - taught tɑːt
- thought θɑːt
* **ed** (after a voiceless consonant p, k, f, s, sh, ch, th)
- hoped hoʊpt
diff --git a/1000-hours/sounds-of-american-english/4.1-multisounds.md b/1000-hours/sounds-of-american-english/4.1-multisounds.md
index ae927fe2..12dbf56f 100644
--- a/1000-hours/sounds-of-american-english/4.1-multisounds.md
+++ b/1000-hours/sounds-of-american-english/4.1-multisounds.md
@@ -1,6 +1,6 @@
# 4.1. 多音拼写（Spellings with multiple sounds）
-之前的章节里，都罗列了对应每个音素可能的拼写。有些拼写只对应一个读音，比如，**h** 就只对应着 h；但，有一些拼写可能对应着多个读音。以下是一个总结整理，需要经过反复对照而暗熟于心。
+之前的章节里，都罗列了对应每个音素可能的拼写。有些拼写只对应一个读音，比如，**h** 就只对应着 h；但，有一些拼写可能对应着多个读音。以下是一个总结整理，需要经过反复对照而谙熟于心。
In the previous chapters, we listed the possible spellings for each phoneme. Some spellings correspond to just one sound, like **h**, which only corresponds to h. However, some spellings can correspond to multiple sounds. Here's a summary that needs to be reviewed repeatedly until it becomes second nature.
diff --git a/1000-hours/sounds-of-american-english/4.3.1-prefixes.md b/1000-hours/sounds-of-american-english/4.3.1-prefixes.md
index e13086b7..5314e8bf 100644
--- a/1000-hours/sounds-of-american-english/4.3.1-prefixes.md
+++ b/1000-hours/sounds-of-american-english/4.3.1-prefixes.md
@@ -32,7 +32,7 @@
- mislead ˌmɪsˈliːd
7. **non-** (not)
- - nonstick not exist
+ - nonstick ˌnɑːnˈstɪk
- nonprofit nɑnˈprɑf·ɪt
- nonviolent ˌnɑːnˈvaɪə.lənt
@@ -69,7 +69,7 @@
14. **semi-** (half, partly)
- semicircle ˈsem.iˌsɝː.kəl
- semifinal ˌsem.iˈfaɪ.nəl
- - semiconscious not exist
+ - semiconscious ˌsem.aɪ.ˈkɑːn.ʃəs/
15. **anti-** (against)
- antibiotic ˌæn.t̬i.baɪˈɑː.t̬ɪk