used to do vs be used to doing vs get used to — three-way trap (GiU Unit 61)

The frame

When we were children, we used to go swimming very often. ✓

Past-tense frame → used to + bare infinitive (habit that ended).

Three-way split

	used to + do	be used to + -ing	get used to + -ing
Meaning	past habit, now gone	accustomed now (state)	becoming accustomed (process)
Form	bare infinitive	be + -ing/noun	get + -ing/noun
Example	I used to smoke (quit)	I’m used to getting up early	I’m getting used to living here
JP mirror	よく〜したものだ	慣れている	慣れてくる

• used to do — no be: I used to go swimming (when we were children → gone)
• be used to doing — be + -ing always: ✗ I’m used to get up early. Tense free: was used to, will be used to
• get used to — process, still adjusting: I’m getting used to it

Test

Past habit that stopped → used to + bare. Comfortable with X now → be used to + -ing. In transition → get used to + -ing.

Source

Raymond Murphy, English Grammar in Use, Unit 61 — I’m used to… Ebot lesson 2026-09-05.