30:17
STRUCTURE
2585 Views
01:56
READING COMPREHENSION &VOCABULARY
1485 Views
01:52
The Form of Irregular Verbs
1489 Views
01:59
The Tense of the Passive Voice
1611 Views
09:31
Changing from Active into Passive
1348 Views
07:20
The Form of the Passive Voice
1572 Views
03:29
What is the Passive Voice?
1601 Views
03:45
The Form of the Active Voice
1552 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
2077 Views
03:20
Since vs For
1683 Views
04:50
Have or Has
1507 Views
00:49
Key Words: Present Perfect
3427 Views
09:03
The Use of the Present Perfect
1527 Views
03:08
Meaning and Form
1580 Views
02:40
Writing Formal Letters
1559 Views
03:10
Language Use
2135 Views
09:35
Parallel Structure
1709 Views
04:35
Prepositions of Instruments and Means
1528 Views
03:27
Polite Requests
1611 Views
06:30
May as a Modal of Permission and Request
1686 Views
04:11
Can as a Modal of Permission and Request
1461 Views
02:50
عناصر الاداء
1458 Views
03:45
شركة ستيرن
1017 Views
01:15
مقياس القيمة المضافة
1303 Views
02:58
مقياس الربحية
1195 Views
02:39
معايير دركر
1402 Views
03:51
مقايس الاداء
1384 Views
01:41
اتخاذ اجراءات تصحيحية
1080 Views
01:52
المرحلة الثانية من الرقابة
1174 Views
02:49
مراحل الرقابة
2557 Views