Will vs. Going to.

British English vs. American English

Present Continuous vs. Present Simple

Present Simple vs. Present Perfect

Some vs. Any

Past Simple vs. Past Continuous

Present Perfect vs. Past Simple – main differences

Present Perfect vs. Present Perfect Continuous

Past Simple vs. Present Perfect

Used to do

Be/get used to something

Verb patterns(to)

Present Simple referring to the future

1st conditional

For/Since

Prepositions of time(in, on, at)

Third conditional

Third Conditional and 2nd Conditional

Verb patterns (ing)

Causes of concession (although, despite, however)

Causative have.

Compound adjectives of measurements

Modal verbs in the past (2)

Like and as

Determiners: each, every

Modals (1)

Countable and Uncountable nouns

Modals (2)

Modals in the past (1)

Present Perfect

Present Continuous

Past Perfect Continuous

Reported questions.

Past Perfect

Prepositions of place: in, at

So and such

Type 2 Conditionals

Prefer and Would Rather

Wish

Even if/ even when/ even though

Auxiliary verbs (have do can, etc.) I think so/ I hope so, etc.

Have got and have

Myself/ yourself/ themselves etc.

No/ none/ any/ nothing/ nobody etc.

As if/ as though/ like

Enough and too

All/ every/ whole

Had better/ it’s time….

For/ during/ while

All/ all of, most/most of

Demonstratives (this/these, that/those)

On my own/ by myself

Conjunctions

The genitive (possession)

Expressing the purpose