Учёба и развитие

have / has been + -ing: процесс, который длится до сейчас (или только что закончился и виден результат); for + срок, since / ever since + момент, lately, over the past few months, on and off; How long have you been …?; глаголы состояния — без Continuous

have done — результат, число, завершение (two essays, in total, at last, finished, submitted); have been doing — деятельность, срок, состояние сейчас (for ages, all morning, the whole afternoon, exhausted); число сделанного — только Simple

How many / How much → have done (dozens of, several); How long → have been doing; глаголы состояния (know, believe, own, belong to, matter, seem, doubt, suppose, deserve) — только Simple: I've known her for years; have / think / see / feel — два значения

make progress / headway, gain confidence / experience, overcome an obstacle / a fear, hit a plateau, struggle with, a setback; оценка: come a long way, room for improvement, a long way off, frustrating / rewarding; progress — неисчисляемое

What worked / helped most / didn't work was + -ing; the key is (to) …; the reason it worked is that …; стратегии: immersion, exposure to, in context, little and often, shadowing, spaced repetition, trial and error; approach to, technique, consistent

насколько: slightly → fairly → considerably; часть: partly, to some extent, largely; сравнение: relatively; выделение: particularly, by far + superlative; итог: on the whole; quite — «довольно» / «совершенно»; largely due to + сущ.