你的句子不宜添加 how。句意:
As time passed, people learned to accept the changes. 随着时间的推移,人们学会了接受这些改变。
一般说来,当表示有意识地学习做某事时,后面的不定式有没有how都可以。如:
She learned (how) to weld. 她学会了焊接。
Later on I learned (how) to read music. 后来我学会了识谱。
She learned (how) to turn a cartwheel. 她学会了如何做侧手翻。
he finally learned (how) to drive at the grand old age of 70. 她最终在70岁高龄学会了开车。
但当表示无意识地学习做某事时,后面的不定式通常不用how。如:
I must learn to bite my lip. 我必须学会不乱说话。
Very early in life when the baby feels the pangs of hunger, she learns to scream. 当新生儿感到饥饿时,就学会了喊叫。
Since I had the accident, I’ve learned to take each day as it comes. 自从出了那次事故后,我就学会了一切顺其自然。