infinitive

Infinitives ( to+verb) are often seen in English conversation.

eg. I go to bookshop to buy book. ("to buy" is infinitive in this case)

In Japanese , "....suru tameni" , " ...no tameni " or " ...tameni " is very convinient word for infinitives.

Watashi wa hon o kau tameni hon-ya ni ikimasu.( I, book, buy, to(infinitive), bookshop, to, go)
kau : buy
tameni : for the purpose of
hon-ya: bookshop,
ya : "ya" means shop
iku : go
(ika-nai, iki-masu, iku, iku-toki, ike-ba, ike)

"tameni" comes just after a verb(plain)
yomu tameni : to read
au tameni : to meet, to see
iu tameni : to say

"no tameni" comes after noun
dokusho(reading) no tameni : for reading
unten(driving) no tameni : for driving

"suru tameni" means " for doing..." ( same with " no tameni")
dokusho(reading) suru tameni : for reading
unten(driving) suru tameni : for driving

Pactice;

Watashi wa anata ni au tameni koko ni kita. : I came here to see you.
watashi : I
" wa " of "watashi wa" makes "I" subject.
anata : you
ni : to, with
"ni " of " anata ni" makes "you " objective.
au : meet , see
(awa-nai, ai-masu, au, au-toki, ae-ba ,ae)
tameni : for
koko : (noun) here
ni: to
kita : past tense of "kuru" , came
kuru :come
(ko-nai, ki-masu, kuru, kuru-toki, kure-ba, koi)
ki + ta : came

Watashi wa anata ni au tameni koko ni kita. : I, you , with, see, for , here, came : I came here to see you.