What is the difference between そして and そしたら


Both そして and そしたら translated by most dictionaries as THEN. Is there any
difference in usage between these conjunctions?




"Then" has many meanings. Let's first look at [an English
dictionary](https://www.merriam-webster.com/dictionary/then).

>   1. : at that time
>   2. **a** : soon after that : next in order of time  
>  // walked to the door, _then_ turned  
>  **b** : following next after in order of position, narration, or
> enumeration : being next in a series  
>  // first came the clowns, and _then_ came the elephants  
>  **c** : in addition : besides  
>  // _then_ there is the interest to be paid
>   3. **a** : as a necessary consequence  
>  // if the angles are equal, _then_ the complements are equal  
>  **b (1)** : in that case  
>  // take it, _then_ , if you want it so much  
>  **(2)** —used after but to qualify or offset a preceding statement  
>  // she lost the race, but _then_ she never really expected to win  
>  **c** : according to that : as may be inferred  
>  // your mind is made up, _then_  
>  **d** : as it appears : by way of summing up  
>  // the cause of the accident, _then_ , is established
>

そして derives from そうして, which literally means "do so, and". Thus when you use
it between the sentences, it roughly means "after that". It corresponds to the
definitions under branch **2** above.

そしたら is likewise the contraction of そうしたら, which means "if have done so". If
you translate it using "then", it'd be basically **3a** , **b(1)** in the list
(because other definitions are not conjunctive).

Usage-wise, そして is already an established word even if it's a contraction,
while そしたら is still counted as non-standard, colloquial form of そうしたら.




"Then" has many meanings. Let's first look at [an English
dictionary](https://www.merriam-webster.com/dictionary/then).

>   1. : at that time
>   2. **a** : soon after that : next in order of time  
>  // walked to the door, _then_ turned  
>  **b** : following next after in order of position, narration, or
> enumeration : being next in a series  
>  // first came the clowns, and _then_ came the elephants  
>  **c** : in addition : besides  
>  // _then_ there is the interest to be paid
>   3. **a** : as a necessary consequence  
>  // if the angles are equal, _then_ the complements are equal  
>  **b (1)** : in that case  
>  // take it, _then_ , if you want it so much  
>  **(2)** —used after but to qualify or offset a preceding statement  
>  // she lost the race, but _then_ she never really expected to win  
>  **c** : according to that : as may be inferred  
>  // your mind is made up, _then_  
>  **d** : as it appears : by way of summing up  
>  // the cause of the accident, _then_ , is established
>

そして derives from そうして, which literally means "do so, and". Thus when you use
it between the sentences, it roughly means "after that". It corresponds to the
definitions under branch **2** above.

そしたら is likewise the contraction of そうしたら, which means "if have done so". If
you translate it using "then", it'd be basically **3a** , **b(1)** in the list
(because other definitions are not conjunctive).

Usage-wise, そして is already an established word even if it's a contraction,
while そしたら is still counted as non-standard, colloquial form of そうしたら.

