幼児はしゃべることができないので、ほしいものが手に入るまで泣き叫ぶ。

tbd

An infant isn't capable of speaking, so it just screams until it gets what it wants.

An infant is not capable of speaking, so it just screams until it gets what it wants.

赤ん坊がミルクを欲しがって泣き叫んだ。

tbd

The baby clamored to be fed.

怪我をしないうちから泣き叫ぶな。

tbd

Don't scream before you get injured.

Don't cry before you get hurt.

Don't cry trouble half-way.