The interrogative (вопросительный) words

What (что, какой)

Who (кто)

Which (какой, который из)

When (когда),

Where (где, куда)

How (как)

How much (сколько)

How many (сколько)

How long (сколько времени)

Whom (кого, кому)

Why (почему)

Whose (чей)

How often (как часто)

How many times (сколько раз)

How soon (как скоро, когда)

What time (в котором часу)

What kind (какой, какого рода)

The three forms of the verb

Come, came, come, coming

Go, went, gone, going

Put, put, put, putting

Be; was, were; been; being

Have, had, had, having

Make, made, made, making

Do, did, done, doing

Give, gave, given, giving

Hold, held, held, holding

Tell, told, told, telling

Think, thought, thought, thinking

See, saw, seen, seeing

Write, wrote, written, writing

Read, read, read, reading

Get, got, got, getting

Say, said, said, saying

Know, knew, known, knowing

Study, studied, studied, studying

Learn, learnt, learnt, learning

Return, returned, returned, returning

Take, took, taken, taking