30:17
STRUCTURE
2388 Views
01:56
READING COMPREHENSION &VOCABULARY
1326 Views
01:52
The Form of Irregular Verbs
1340 Views
01:59
The Tense of the Passive Voice
1414 Views
09:31
Changing from Active into Passive
1189 Views
07:20
The Form of the Passive Voice
1396 Views
03:29
What is the Passive Voice?
1436 Views
03:45
The Form of the Active Voice
1391 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1818 Views
03:20
Since vs For
1539 Views
04:50
Have or Has
1355 Views
00:49
Key Words: Present Perfect
3203 Views
09:03
The Use of the Present Perfect
1353 Views
03:08
Meaning and Form
1393 Views
02:40
Writing Formal Letters
1385 Views
03:10
Language Use
1977 Views
09:35
Parallel Structure
1541 Views
04:35
Prepositions of Instruments and Means
1360 Views
03:27
Polite Requests
1438 Views
06:30
May as a Modal of Permission and Request
1423 Views
04:11
Can as a Modal of Permission and Request
1246 Views
02:50
عناصر الاداء
1362 Views
03:45
شركة ستيرن
930 Views
01:15
مقياس القيمة المضافة
1203 Views
02:58
مقياس الربحية
1132 Views
02:39
معايير دركر
1286 Views
03:51
مقايس الاداء
1296 Views
01:41
اتخاذ اجراءات تصحيحية
1000 Views
01:52
المرحلة الثانية من الرقابة
970 Views
02:49
مراحل الرقابة
2301 Views