What's the purpose of ta-form +りする and how to use it?


Just wanted to know how to apply the りする to a verb when saying something like
"I want to visit japan and eat food." I've seen "今度の 夏休みに 川に行ったり、海に行ったりします"
but is it as simple as putting り after the ta-form for all things listed prior
to the last action?




You can use 「～たり～たりします」 "do things like ~~ and ~~" to list two or more
actions. So your sentence means...

> 今度の夏休みに川に行っ **たり** 、海に行っ **たりします** 。  
>  In my next summer vacation I'll do things like going to the river and going
> to the beach. (～たり～たり implies you'll probably do other things too.)

If you want to say "I **want to** do things like ~~ and ~~", you can use
「～たり～たりしたいです」, as in:

> 今度の夏休みに川に行っ **たり** 、海に行っ **たりしたいです** 。  
>  In my next summer vacation I **want to** do things like going to the river
> and going to the beach. (～たり～たり implies you probably want to do other things
> too.)

* * *

To say "I want to visit Japan and eat food", you could use the て form for
connecting the two verb phrases, and the たい form for "want to~~" (e.g.
食べたい、飲みたい、見たい、行きたい...), as in:

> 日本に行っ **て** 、（日本の）食べ物を食べ **たい** です。  
>  I want to visit Japan and (then) eat the food (there).




You can use 「～たり～たりします」 "do things like ~~ and ~~" to list two or more
actions. So your sentence means...

> 今度の夏休みに川に行っ **たり** 、海に行っ **たりします** 。  
>  In my next summer vacation I'll do things like going to the river and going
> to the beach. (～たり～たり implies you'll probably do other things too.)

If you want to say "I **want to** do things like ~~ and ~~", you can use
「～たり～たりしたいです」, as in:

> 今度の夏休みに川に行っ **たり** 、海に行っ **たりしたいです** 。  
>  In my next summer vacation I **want to** do things like going to the river
> and going to the beach. (～たり～たり implies you probably want to do other things
> too.)

* * *

To say "I want to visit Japan and eat food", you could use the て form for
connecting the two verb phrases, and the たい form for "want to~~" (e.g.
食べたい、飲みたい、見たい、行きたい...), as in:

> 日本に行っ **て** 、（日本の）食べ物を食べ **たい** です。  
>  I want to visit Japan and (then) eat the food (there).

