Вы хотите объяснить маленькому ребенку, почему курение и употребление наркотиков опасны, что вы скажете, вы можете использовать некоторые из этих идей:
to be hardly able to live normal life
to become less attractive
to come down with colds more often
to commit crimes to get money for drugs and cigarettes
to feel terriblt sick
to get heart problems problems
to get pains all over
to get poor teeth and bad breath
to get week eyes
to grow less physically active
to have weaker children
to live a shorter life
to look much older
to lose appetite
to lose much weight
to lose sleep
to risk catching infections
Только не очень сложные предложения