比如学习care 单词，首先学会了它的变形 cares cared，If you care about something, you feel that it is important and are concerned about it.
变形单词 加er为 career ：A career is the job or profession that someone does for a long period of their life.
career 加ist为careerist ：Careerist people are ambitious and think that their career is more important than anything else.
加woman为career woman 、 career women： A career woman is a woman with a career who is interested in working and progressing in her job, rather than staying at home looking after the house and children.
加free为carefree ： A carefree person or period of time doesn't have or involve any problems, worries, or responsibilities.
加ful为： careful ：If you are careful, you give serious attention to what you are doing, in order to avoid harm, damage, or mistakes. If you are careful to do something, you make sure that you do it.
加giver为：caregiver ：A caregiver is someone who is responsible for looking after another person, for example, a person who is disabled, ill, or very young. (mainly AM)
加home为：care home ：A care home is a large house or institution where people with particular problems or special needs are looked after.
加less为： careless ：If you are careless, you do not pay enough attention to what you are doing, and so you make mistakes, or cause harm or damage.
再加ly为：carelessly ：If someone does something carelessly, they do it without much thought or effort. (WRITTEN)
er形式：carer ：A carer is someone who is responsible for looking after another person, for example, a person who is disabled, ill, or very young. (BRIT; in AM use caregiver or caretaker)
ss形式：caress caresses caressing caressed ：If you caress someone, you stroke them gently and affectionately. (WRITTEN)
加taker为caretaker ：A caretaker is a person whose job it is to look after a large building such as a school or a block of flats or apartments, and deal with small repairs to it. (BRIT; in AM use janitor)
加woker为care worker ：A care worker is someone whose job involves helping people who have particular problems or special needs, for example in a care home.
加worn为 careworn ：A person who looks careworn looks worried, tired, and unhappy.
眼睛再压码单词的时候，只要将前后单词的区别加以注意，就可以通过一个 care单词学会上面的系列单词了。
