～がち
Tend to do something, often undesirably
You’ll be able to describe a recurring tendency toward actions or states that are often negative or unwanted.
キャンプの夜は、楽しくて夜更かししがちです。
kyanpu no yoru wa, tanoshikute yofukashi shigachi desu.
What do you think this sentence means?
On camping nights, because it is so fun, we tend to stay up late.
Describe a recurring undesirable tendency
Attach がち to a verb stem or noun to express an inclination or tendency to fall into an undesirable state ("tend to...", "prone to...").
私は忘れ物をしがちです。
watashi wa wasuremono o shigachi desu.
I tend to leave things behind.
冬は風邪をひきがちだ。
fuyu wa kaze o hikigachi da.
In winter I tend to catch colds.
Attach がち to the masu-stem or noun
Attach がち to the verb stem (masu-stem) or noun. The resulting phrase functions as a na-adjective or adverb with に: ～がちな <slot>noun</slot>, ～がちになる, ～がちだ.
最近の若者は、休日に家に閉じこもりがちだ。
saikin no wakamono wa, kyuujitsu ni ie ni tojikomorigachi da.
Young people these days tend to stay cooped up at home on holidays.
～がち vs ～気味
～がち says something tends to happen again and again. ～気味 says there is a slight touch of a condition right now.
～がち, tend to
最近、疲れがちだ。
saikin, tsukaregachi da.
Lately I tend to get tired.
It keeps happening.
～気味, a touch of
最近、疲れ気味だ。
saikin, tsukaregimi da.
Lately I'm a bit tired.
A slight condition now.
母は仕事が忙しいと、朝ご飯を抜きがちになる。
haha wa shigoto ga isogashii to, asagohan o nukigachi ni naru.
When my mother is busy with work, she tends to skip breakfast.
パソコンで長い時間仕事をしていると、姿勢が悪くなりがちなので、時々立って体を動かしましょう。
pasokon de nagai jikan shigoto o shite iru to, shisei ga waruku narigachi na node, tokidoki tatte karada o ugokashimashou.
When you work at a computer for a long time, your posture tends to get worse, so stand up and move around now and then.
息子は小さいころ病気がちで、よく学校を休んでいた。
musuko wa chiisai koro byouki gachi de, yoku gakkou o yasunde ita.
When my son was little, he was often sick and frequently missed school.
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