mason00 发表于 8-11-2011 18:40:07

English grammar: Conditional

http://www.englishpage.com/conditional/conditionalintro.html

Present Conditionals

Present Real Conditional
FORM

[... Simple Present ... if / when ... Simple Present ...]

Present Unreal Conditional
FORM

[... would + verb ... if ... Simple Past ...]

Past Conditionals

Past Real Conditional
FORM

[... Simple Past... if / when ... Simple Past ...]

Past Unreal Conditional
FORM

[... would have + past participle ... if ... Past Perfect ...]

Future Conditionals

Future Real Conditional
FORM

[... Simple Future ... if / when ... Simple Present ...]

Future Unreal Conditional
FORM 1 (Most Common Form)

[... would + verb ... if ... Simple Past ...]

FORM 2

[... would be + present participle ... if ... were + present participle ...]

FORM 3

[... would be + present participle ... if ... were going to + verb ...]

[ 本帖最后由 mason00 于 8-11-2011 16:42 编辑 ]

mason00 发表于 8-11-2011 18:46:44

That website is a good resource to learn English grammar. It is interesting to see that the present unreal conditional shares the same form with future unreal conditional form 1. I saw other classifications, but this is the clearest one I think. It also provides detailed sentence samples and usage guide.

[ 本帖最后由 mason00 于 8-11-2011 17:50 编辑 ]
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