30:17
STRUCTURE
2696 Views
01:56
READING COMPREHENSION &VOCABULARY
1576 Views
01:52
The Form of Irregular Verbs
1583 Views
01:59
The Tense of the Passive Voice
1710 Views
09:31
Changing from Active into Passive
1439 Views
07:20
The Form of the Passive Voice
1667 Views
03:29
What is the Passive Voice?
1695 Views
03:45
The Form of the Active Voice
1655 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2257 Views
03:20
Since vs For
1767 Views
04:50
Have or Has
1588 Views
00:49
Key Words: Present Perfect
3598 Views
09:03
The Use of the Present Perfect
1645 Views
03:08
Meaning and Form
1703 Views
02:40
Writing Formal Letters
1673 Views
03:10
Language Use
2241 Views
09:35
Parallel Structure
1811 Views
04:35
Prepositions of Instruments and Means
1630 Views
03:27
Polite Requests
1692 Views
06:30
May as a Modal of Permission and Request
1817 Views
04:11
Can as a Modal of Permission and Request
1642 Views
02:50
عناصر الاداء
1548 Views
03:45
شركة ستيرن
1107 Views
01:15
مقياس القيمة المضافة
1356 Views
02:58
مقياس الربحية
1259 Views
02:39
معايير دركر
1470 Views
03:51
مقايس الاداء
1468 Views
01:41
اتخاذ اجراءات تصحيحية
1147 Views
01:52
المرحلة الثانية من الرقابة
1304 Views
02:49
مراحل الرقابة
2751 Views