Pierwszy okres warunkowy

Zastosowanie

Pierwszego okresu warunkowego używamy w odniesieniu do sytuacji, które będą miały miejsce w przyszłości.

Formy

	'If' -clause: present tenses	main clause: 'shall/will' future
be:	If I am better tomorrow,	I will go to work.
have:	If I have a headache,	I will take an aspirin.
simple present:	If he finishes early,	he will go home.
present progressive:	If you are standing in the rain,	you will catch cold.
present perfect:	If he has arrived at the station,	he will be here soon.
present perfect progressive:	If he has been travelling all night,	he will need a rest.
can, must:	If I can afford a car,	I will buy one.

Wariant I: 'If' + present + modal

	'If' -clause: present tenses	main clause: modal
simple present:	If she finishes early,	she can/could phone me. she may/might phone me. she should/ought to phone me. she must phone me.
present progressive:	If she is arriving today,
present perfect:	If she has arrived,
present perfect progressive:	If she has been waiting,
can, must	If she can't understand it,

Wariant II: 'If' + should + e.g. imperative

'If' -clause: present tenses	main clause: e.g. imperative
If you (should) see him,	please give him my regards.
Should you see him,
If you (should) happen to see him,
Should you happen to see him,

Wariant III: Imperative + conjunction + clause

imperative	conjunction	main clause: 'shall/will'
Provide the materials	and	we'll do the job.
Stop shouting,	or	you'll wake up the neighbours.
Put that down,	or else	I'll hit you.
Be there on time,	otherwise	you'll lose the job.