30:17
STRUCTURE
2442 Views
01:56
READING COMPREHENSION &VOCABULARY
1361 Views
01:52
The Form of Irregular Verbs
1374 Views
01:59
The Tense of the Passive Voice
1464 Views
09:31
Changing from Active into Passive
1226 Views
07:20
The Form of the Passive Voice
1434 Views
03:29
What is the Passive Voice?
1475 Views
03:45
The Form of the Active Voice
1427 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1898 Views
03:20
Since vs For
1575 Views
04:50
Have or Has
1389 Views
00:49
Key Words: Present Perfect
3277 Views
09:03
The Use of the Present Perfect
1393 Views
03:08
Meaning and Form
1439 Views
02:40
Writing Formal Letters
1430 Views
03:10
Language Use
2014 Views
09:35
Parallel Structure
1586 Views
04:35
Prepositions of Instruments and Means
1399 Views
03:27
Polite Requests
1494 Views
06:30
May as a Modal of Permission and Request
1481 Views
04:11
Can as a Modal of Permission and Request
1291 Views
02:50
عناصر الاداء
1393 Views
03:45
شركة ستيرن
964 Views
01:15
مقياس القيمة المضافة
1258 Views
02:58
مقياس الربحية
1157 Views
02:39
معايير دركر
1318 Views
03:51
مقايس الاداء
1325 Views
01:41
اتخاذ اجراءات تصحيحية
1023 Views
01:52
المرحلة الثانية من الرقابة
1028 Views
02:49
مراحل الرقابة
2378 Views