30:17
STRUCTURE
2407 Views
01:56
READING COMPREHENSION &VOCABULARY
1340 Views
01:52
The Form of Irregular Verbs
1355 Views
01:59
The Tense of the Passive Voice
1426 Views
09:31
Changing from Active into Passive
1208 Views
07:20
The Form of the Passive Voice
1413 Views
03:29
What is the Passive Voice?
1453 Views
03:45
The Form of the Active Voice
1408 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1847 Views
03:20
Since vs For
1551 Views
04:50
Have or Has
1371 Views
00:49
Key Words: Present Perfect
3238 Views
09:03
The Use of the Present Perfect
1370 Views
03:08
Meaning and Form
1417 Views
02:40
Writing Formal Letters
1407 Views
03:10
Language Use
1991 Views
09:35
Parallel Structure
1562 Views
04:35
Prepositions of Instruments and Means
1374 Views
03:27
Polite Requests
1465 Views
06:30
May as a Modal of Permission and Request
1452 Views
04:11
Can as a Modal of Permission and Request
1261 Views
02:50
عناصر الاداء
1375 Views
03:45
شركة ستيرن
942 Views
01:15
مقياس القيمة المضافة
1230 Views
02:58
مقياس الربحية
1145 Views
02:39
معايير دركر
1301 Views
03:51
مقايس الاداء
1311 Views
01:41
اتخاذ اجراءات تصحيحية
1012 Views
01:52
المرحلة الثانية من الرقابة
989 Views
02:49
مراحل الرقابة
2341 Views