Meaning of 忘れがち in Japanese

He is apt to forget his promise.

He is apt to leave his umbrella on the train.

Old men are apt to forget.

One is apt to forget his own faults.

When we are in good health, we are apt to forget its value.

We are apt to forget this fact.

We are inclined to forget this fact.

Nowadays we are apt to forget the benefits of nature.

As a result, it is undeniable that important disciplines and moral education have been neglected. By placing excessive importance on scholastic achievement, many parents have forgotten such basic social courtesies as consideration for others.