30:17
STRUCTURE
2471 Views
01:56
READING COMPREHENSION &VOCABULARY
1377 Views
01:52
The Form of Irregular Verbs
1393 Views
01:59
The Tense of the Passive Voice
1489 Views
09:31
Changing from Active into Passive
1246 Views
07:20
The Form of the Passive Voice
1459 Views
03:29
What is the Passive Voice?
1494 Views
03:45
The Form of the Active Voice
1446 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1921 Views
03:20
Since vs For
1591 Views
04:50
Have or Has
1405 Views
00:49
Key Words: Present Perfect
3300 Views
09:03
The Use of the Present Perfect
1411 Views
03:08
Meaning and Form
1465 Views
02:40
Writing Formal Letters
1448 Views
03:10
Language Use
2033 Views
09:35
Parallel Structure
1607 Views
04:35
Prepositions of Instruments and Means
1420 Views
03:27
Polite Requests
1514 Views
06:30
May as a Modal of Permission and Request
1505 Views
04:11
Can as a Modal of Permission and Request
1314 Views
02:50
عناصر الاداء
1400 Views
03:45
شركة ستيرن
979 Views
01:15
مقياس القيمة المضافة
1267 Views
02:58
مقياس الربحية
1166 Views
02:39
معايير دركر
1330 Views
03:51
مقايس الاداء
1331 Views
01:41
اتخاذ اجراءات تصحيحية
1027 Views
01:52
المرحلة الثانية من الرقابة
1054 Views
02:49
مراحل الرقابة
2401 Views