Module 1

Conditional type 0

If/when + simple present

if/when you heat water it boils

Use: to express a general truth or scientic fact. in this type of conditional, we can use when instead of if.
When the if-clause precedes the main clause, we use a comma to separate the two clauses. For example:

If you heat water, it boils   Water boils if you heat it

simple present

We use the simple present for:

* facts: the sun rises in the east. it doesn't rise in the west

*habits/routines: astronauts usually sleep 8 hours a day after a 16 hour work day. they take spoange baths

*timetables: the space museum opens at 9 pm every weekday

spelling rules 

* most verbs: + - s / sleep - he sleeps

*verbs in ass: - ss , sh , ch , x , o + es

*consonant: + y + ies / study - he studies

*vowel: + y + - s / play - he plays

Conditional type 1

if + simple present -----> will + base form of main verb.
if we keep cutting down trees, animals will lose their habitat.

Use: to talk about a possible situation in the present or future.
Animals will lose their habitat if we keep cutting down trees.


Will

We use will for:
on the spot decisions: i'm tired. i'll take a nap
predictions based on what we know:
you'll lose weight with this workout
promises, offers, threats , hopes
i promise you'll feel better right away


Simple present - present progresive

*for habits/routines: He works in a zoo. He gets up at 6 and feeds the animals 
*for timetables: the zoo opens at 9 pm
*for permanent states y facts: James has blue eyes. cows eat grass

Time expressions: every day , on tuesdays, often , etc

present progresive
*for actions happening now/around the time of speaking: tina is feeding the animals now. she is working hard these days
*tempory situations: tina is working in a zoo for the summer
time expressions: now, at the moment, at the present , etc

The imperative
we use the imperative to give advice , instructions or direct orders
to sound more polite , we can use please
we use don't + base form of the verb to make a negative imperative

we can use the imperative in the main clause in conditional type 1 to give advice or instruction.......