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When moving across a selectively permeable membrane, ions, polar and large molecules cannot dissolve easily in the lipid membrabe. Instead, transport must occor by way of protiens that ac...

When it comes to structuring an English literature essay, I found the most important element to be that the writing has a flow and a strong drive that keeps it structured around your thesis. Whereas at Un...

The future tense is very easy to form and use in Arabic. Simply take the appropriate form of the verb in the present tense:

أفعل I do
تفعل You (masculine singular) do
تفعلين Yo...

Past tense verbs work exactly like present tense verbs only with a different set of modifications to show the subject of the verb:
 

فعلتُ I did
فعلتَ You (masculine singular)...

There are a few simple rules for using present tense verbs correctly in Arabic. 

1. The verb needs to be modified to show who is doing the action, this is done using speci...