“Even if” and “If”

Lets continue practicing “Even if” and “If” sentences.

If I eat a lot I will get fat.  (私はたくさん食べたら太ります.)

Even if I eat a lot, I will not get fat. (私はたくさん食べても太りません.)

Even if I sleep for only one hour, I feel energetic. (一時間しか寝なくても、元気です.)

If I sleep for only one hour, I feel sleepy. (一時間しか寝なければ、眠いです。)