http://www.pons.de/produkte/3-12-517841-X/(牛津大学出版社授权产品)
singing [美 ˈsɪŋɪŋ, 英 ˈsɪŋɪŋ] 名词 U
1. singing (of person, bird):
I. sing <pt sang, past part sung> [美 sɪŋ, 英 sɪŋ] 动词 不及物动词
1.1. sing person/bird:
2. sing (turn informer):
-  sing 俚
-  
II. sing <pt sang, past part sung> [美 sɪŋ, 英 sɪŋ] 动词 trans
1. sing song/tune/chorus:
lesson [美 ˈlɛs(ə)n, 英 ˈlɛs(ə)n] 名词
1.1. lesson (educational):
1.2. lesson (educational):
2. lesson (from experience):
在《PONS词典》中的词汇
I. sing [sɪŋ] 动词 不及物动词 sang, sung
| I | sing | 
|---|---|
| you | sing | 
| he/she/it | sings | 
| we | sing | 
| you | sing | 
| they | sing | 
| I | sang | 
|---|---|
| you | sang | 
| he/she/it | sang | 
| we | sang | 
| you | sang | 
| they | sang | 
| I | have | sung | 
|---|---|---|
| you | have | sung | 
| he/she/it | has | sung | 
| we | have | sung | 
| you | have | sung | 
| they | have | sung | 
| I | had | sung | 
|---|---|---|
| you | had | sung | 
| he/she/it | had | sung | 
| we | had | sung | 
| you | had | sung | 
| they | had | sung | 
无例句可用
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