in mandarin what are the different usages for 以后 and 后来？
For example:i study hard all morning and AFTERWARDS often get hungry.

Question

in mandarin what are the different usages for 以后 and 后来？ 
For example:i study hard all morning and AFTERWARDS often get hungry.

Answer

1 “以后”可以单用，也可以作为后置成分，“后来”只能单用，例如只能说“七月以后”，不能说“七月后来”。
2 “以后”可以指过去，也可以指将来，“后来”只指过去，例如只能说“以后你要注意”，不能说“后来你要注意”。

I study hard all morning and AFTERWARDS often get hungry.
我一早上都在努力学习，之后常常感到很饿。

I hope it helps. :D

Answer

以后 是从现在起往后面算；
后来 是从过去的时间点往后算

Answer

以后 
!) means "in the future"
E.g. 我以后要想要做一个律师 （A child might tell you this when asked about his/ her ideal profession in future.）
       
2) means "from now on"
E.g.  你以后要多看看新闻，否则你根本不了解时事 。 （One might give his/her friend such advice if his/ her friend knows nothing about the breaking news.）

后来 means "afterwards" or "then"

I agree with adah1023. "后来" can be used in a past tense. 
We usually come cross "后来" in a narration. 
A pop Chinese song has such a lyric line "后来，我终于学会了如何去爱。"
E.g. 我去年手机被偷了，后来我又去买了一个新的。（You use “后来” to tell your friend this past event that happened last year. "后来" here suggests the event "you bought a new cell phone" comes after  "the cell phone was stolen"）

Answer

“以后”前面必须有句子或介词，如：我到了以后；从此以后。
“后来”本身是介词，放在一句话最前面，单独使用。

Answer

“以后”前面必须有句子或介词，如：我到了以后；从此以后。
“后来”本身是介词，放在一句话最前面，单独使用。