Составить предложение по примеру!!!

Question

Пример: If you use it a lot, it costs a fortune 
 
1. dog happy-> wag its tail 
2. lizard lose its tail-> grow a new one 
3. throw a stone into a river-> sink

Полина Стародубова · Accepted Answer

If a dog is happy, it wags its tail. 
If a lizard loses its tail, it grows a new one. 
If you throw a stone into a river, it sinks.

Надежда Моисеева · Answer

If you make a dog happy, it'll wag its tail. 
If a lizard loses its tail, it'll have grown a new one. 
If you throw a stone into a river, it'll sink. 
 
Конструкция изъявительного наклонения нарушена. 
 
должно быть if +subject+ V(s), object+will\won't+V(s). 
Например: If it rains, I won't go home.