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Help the starship captain complete the official log regarding a newly discovered, highly dangerous planet.

Although the planet's toxic atmosphere is not conducive _________________________ human life, the extraction mission is fraught _________________________ unforeseen perils that we must navigate. I must apprise the High Council _________________________ our findings immediately, as our colony's continued survival hinges _________________________ securing these rare minerals.

The correct answers are to, with, of, and on.

Conducive to means making a certain situation or outcome likely or possible.

Fraught with is a prepositional adjective meaning filled with or destined to result in (usually something undesirable like danger or problems).

Apprise of is a formal verb phrase meaning to inform or tell someone about something. (It is a common trap to say "apprise about", but "of" is grammatically correct!)

Hinge on (or hinge upon) means to depend entirely on something.

Hard C1 | Advanced Preposition Verb Adjective Phrase Collocations

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Preposition

✅ interested in — ❌ interested on
✅ good at football — ❌ good in football
✅ depend on — ❌ depend of
✅ arrive at the station — ❌ arrive to the station

Prepositions link nouns to the rest of the sentence: time (at 5pm), place (in London), manner (with care), abstract (afraid of). Most are idiomatic — the "correct" preposition must be memorised with each verb/adjective combination.

Rule: there is no universal rule. English prepositions are learned by combination: interested IN, good AT, depend ON, afraid OF. Your native language's equivalent will often mislead.

Verb

walk → walk / walks / walked / walked / walking (5 forms, regular)
go → go / goes / went / gone / going (5 forms, irregular)
be → am/is/are/was/were/be/being/been (8 forms)
can → can / could (modal: only 2 forms, no -s, no -ing)

A verb is the one word class every English sentence requires. Carries tense (when), aspect (duration), mood (attitude), and voice (active/passive). Regular verbs add -ed; ~200 irregular verbs have unpredictable past forms.

Key insight: fix your verbs and most grammar problems disappear. Wrong tense, wrong agreement, wrong form — verb errors account for the majority of grammatical mistakes.

Adjective

✅ a tall building — ❌ a tally building
✅ The soup is hot — ❌ The soup is hotly
✅ a lovely small old table — ❌ a small lovely old table
✅ She seems tired — ❌ She seems tiredly

These bolded words are adjectives — words that describe nouns or pronouns. They sit before a noun (a tall building) or after a linking verb (The soup is hot).

Pattern: if a word can slot between a/the and a noun (a ___ thing) and can take -er/-est, it's almost certainly an adjective.

Phrase

the red car — noun phrase (functions as one noun unit)
on the table — prepositional phrase
has been running — verb phrase
very quickly — adverb phrase

A phrase is a group of words that functions as a single unit WITHOUT a subject + verb pair. Types: noun phrase, verb phrase, prepositional phrase, adjective phrase, adverb phrase.

Key distinction: a phrase lacks a subject-verb pair. If it has subject + verb → it's a clause, not a phrase. Phrases are the building blocks clauses are made of.

Collocations

✅ make a decision — ❌ do a decision
✅ strong coffee — ❌ powerful coffee
✅ heavy rain — ❌ strong rain
✅ highly unlikely — ❌ very unlikely (grammatical, but less natural)

Collocations are word pairs that English habitually puts together. Both options may be grammatically valid, but one sounds native and the other doesn't.

Pattern: there's no logic to predict them — you make decisions but do homework, you have strong coffee but heavy rain. They must be learned as chunks, not deduced from rules.

C1 | Advanced

✅ Not only did she finish early, but she also helped others. — inversion for emphasis
✅ It is the process that matters, not the result. — cleft sentence
✅ I insist that he be present. — formal subjunctive
✅ Were I to disagree, I would say so. — inverted conditional

These are C1 structures — the CEFR advanced level. At C1 you control inversion, cleft sentences, subjunctive forms, and register-switching fluently across formal and informal contexts.

Marker: if you can restructure a sentence for rhetorical effect without hesitation, you're C1.

Hard

Had she not intervened, the situation would have escalated. — inverted conditional
All distractors are grammatically plausible in other contexts
Multiple rules interact (e.g., tense + aspect + modality)
Context determines the answer — no single "rule" is enough

Hard marks upper-intermediate to advanced challenges: B2+, interacting rules, edge cases, plausible distractors, and contexts where pattern-matching fails.

Use "Hard" when Easy/Medium feel trivial and you want to test whether you actually understand a rule versus just recognising surface patterns.