30:17
STRUCTURE
2642 Views
01:56
READING COMPREHENSION &VOCABULARY
1531 Views
01:52
The Form of Irregular Verbs
1529 Views
01:59
The Tense of the Passive Voice
1663 Views
09:31
Changing from Active into Passive
1392 Views
07:20
The Form of the Passive Voice
1614 Views
03:29
What is the Passive Voice?
1645 Views
03:45
The Form of the Active Voice
1609 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2170 Views
03:20
Since vs For
1721 Views
04:50
Have or Has
1545 Views
00:49
Key Words: Present Perfect
3492 Views
09:03
The Use of the Present Perfect
1579 Views
03:08
Meaning and Form
1637 Views
02:40
Writing Formal Letters
1617 Views
03:10
Language Use
2181 Views
09:35
Parallel Structure
1763 Views
04:35
Prepositions of Instruments and Means
1567 Views
03:27
Polite Requests
1647 Views
06:30
May as a Modal of Permission and Request
1738 Views
04:11
Can as a Modal of Permission and Request
1549 Views
02:50
عناصر الاداء
1483 Views
03:45
شركة ستيرن
1049 Views
01:15
مقياس القيمة المضافة
1327 Views
02:58
مقياس الربحية
1231 Views
02:39
معايير دركر
1431 Views
03:51
مقايس الاداء
1421 Views
01:41
اتخاذ اجراءات تصحيحية
1115 Views
01:52
المرحلة الثانية من الرقابة
1223 Views
02:49
مراحل الرقابة
2630 Views