たくさんいる

there are many

→ 沢山
phrase Common #5,834
there are many Used for people and other living things; いる changes form to match the tense and politeness of the sentence.
JA: この公園には鳥がたくさんいる。
EN: There are lots of birds in this park.

いい人はたくさんいるわ。

There are lots of good people.

あちこちにたくさんいるよ

There are lots of them all over the place.

— ライフ・イズ・ビューティフル (1997)

相談できる友達なら、たくさんいるよ。

I have plenty of friends I can talk to.

まだたくさんいるって

They say there are still lots of them.

— Arrietty (2010)

いいや、まだたくさんいる。

No, there are still plenty.

友達はたくさんいるよ。

I have lots of friends.

けっこうたくさんいる

There are quite a few.

— ベルリン・天使の詩 (1987)

泳げない人もたくさんいる。

There are also many people who can't swim.

私を助けてくれる友人はたくさんいる。

I have many friends who help me.

猿と一緒に、蚊もたくさんいるの

Besides the monkeys, there are also lots of mosquitoes.

— バジュランギおじさんと、小さな迷子 (2015)

パイロットに向いている人間は他にたくさんいる

There are plenty of other people who would make good pilots.

— The Wind Rises (2013)