Unlock 3 — Unit 1 — Interactive Grammar 2.0 — Because, Because of & Cause / Effect

Grammar Notes: Reasons & cause / effect

Examples below are original practice models (not taken from any textbook).

Study First

Unit link: In texts about wildlife, you often explain why populations change — use these patterns for clear, accurate reasons and results.

1. Because (conjunction)

Introduces a reason clause: after because, include a subject and a verb (and other words if needed).

Example: Local bird counts fell because nesting sites were disturbed early in the season.

2. Because of (preposition)

Means “as a result of.” It is followed by a noun phrase, a pronoun, or a gerund phrase — not a clause with its own subject + finite verb.

Example: Local bird counts fell because of habitat loss near the river.

3. Focus on the cause (verbs)

Pattern: [cause] + verb + [effect]. Common verbs: causes, leads to, results in.

Example: The storm led to power cuts across the town.

4. Focus on the effect (phrases)

Pattern: [effect] + be + phrase + [cause]. Common phrases: caused by, due to, the result of.

Example: The power cuts were due to the storm.

Activity 2: Fill in the Blanks

Type the missing word(s). Use lowercase unless shown otherwise.

1. The flight was delayed air traffic over the airport.

2. The flight was delayed traffic was heavier than usual.

3. Noise levels rose construction work next door.

4. Noise levels rose workers were using heavy machinery all morning.

5. The new timetable complaints from parents.

6. The complaints were the sudden timetable change.

7. Staff shortages long queues at the help desk.

8. Long queues were those staff shortages.

Activity 3: Flashcards

Tap the card to flip between the label and a short reminder.

Card 1 of 8 Tap to Flip

because

Term

Click to see a tip.

Conjunction — must be followed by a clause (subject + verb).

Reminder

Activity 4: Word Scramble

Unscramble the letters to spell the word.

1. Unscramble (reason conjunction):

AESUCBE

2. Unscramble (two-word preposition, typed as one word):

EACSUFOEB

3. Unscramble (outcome / consequence):

FETCEF

4. Unscramble (reason or source):

ESUAC

5. Unscramble (preposition: “owing to”):

UEDOT

6. Unscramble (verb: “brings about”):

SEUSAC

Activity 5: Sentence Builder

Write about study habits, technology, or travel. Follow each instruction. Start with a capital letter and end with punctuation.

Use because + a clause (do not use only “because of”):

Use because of + a noun phrase (not a full clause):

Use a cause verb: leads to, causes, caused, or results in:

Use an effect pattern: is due to, is caused by, or is the result of:

Activity 6: Matching Game

Match each label on the left with the correct explanation on the right.

Interactive Grammar Lab 2.0

Grammar Notes: Reasons & cause / effect

1. Because (conjunction)

2. Because of (preposition)

3. Focus on the cause (verbs)

4. Focus on the effect (phrases)

Activity 1: Quiz

1. The outdoor workshop was cancelled _____ a severe weather warning.

2. The outdoor workshop was cancelled _____ the forecast showed unsafe conditions.

3. Library opening hours were reduced _____ city budget cuts.

4. Library opening hours were reduced _____ officials needed to save money.

5. Heavy rain overnight _____ serious flooding in the older part of town.

6. Widespread power failures were _____ a storm that damaged several substations.

7. A misunderstanding between teams _____ long delays for travellers at the station.

8. Which sentence uses due to correctly to link an effect with a cause?